Cisco 1700 Series - Cisco IOS Release 12.2(4)YB
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Table Of Contents
Release Notes for the Cisco 1700 Series Routers for Cisco IOS Release 12.2(4)YB
Determining Your Software Release
Upgrading to a New Software Release
New Hardware Features in Release 12.2(4)YB
1- and 2-Port Analog Modem WIC
1- and 2-Port T1/E1 Multiflex Voice/WAN Interface Card
New Software Features in Release 12.2(4)YB
Channelized Voice, Fractional, and Full T1 and E1 Services
Quality of Service for Virtual Private Networks
New Software Features Supported on Cisco 1760 Routers
New Software Features in Release 12.2(4)T
1- and 2-Port Analog Modem WIC
Fan Operation in Cisco 1700 Series Routers
Flash defaults to Flash:1 on Multipartition Flash
Peak Cell Rate and Sustainable Cell Rate Values
Using the "boot flash" and "boot system tftp" Commands
Resolved Caveats - Release 12.2(4)YB
Unresolved Caveats - Release 12.2(4)YB
Obtaining Documentation and Technical Assistance
Release Notes for the Cisco 1700 Series Routers for Cisco IOS Release 12.2(4)YB
October 7, 2002
These release notes describe new features and significant software components for the Cisco 1700 series routers that support Cisco IOS Release 12.2 T, up to and including Release 12.2(4)YB. These release notes are updated as needed to describe new memory requirements, new features, new hardware support, software platform deferrals, microcode or modem code changes, related document changes, and any other important changes. Use these release notes with the Cross-Platform Release Notes for Cisco IOS Release 12.2 T located on CCO and the Documentation CD.
For a list of the software caveats that apply to Release 12.2(4)YB, refer to the section "Caveats" and to the online Caveats for Cisco IOS Release 12.2 T document. The caveats document is updated for every 12.2 T maintenance release and is located on Cisco Connection Online (CCO) and the Documentation CD.
Note
For the Cisco 1750 router, Release 12.2(4)YB contains only one new feature (VPN QoS) and no new voice features.
Contents
These release notes discuss the following topics:
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System Requirements
This section describes the system requirements for Release 12.2(4)YB and includes the following sections:
•
•
Memory Requirements
This section describes the memory requirements for the Cisco IOS feature sets supported by Cisco IOS Release 12.2(4)YB on the Cisco 1700 series routers. In Table 1, the term xDSL represents both ADSL and G.SHDSL.
Note
Caution
Hardware Supported
Cisco IOS Release 12.2(4)YB supports the following Cisco 1700 series routers:
•
•
•
•
•
•
The Cisco 1710, 1720, and 1721 routers run data images only. The Cisco 1750, 1750-2V, and 1750-4V routers run data or data-and-voice images, providing analog voice support. Cisco 1751, 1751-V, 1760, and 1760-V routers run data or data-and-voice images, providing digital and analog voice support.
For detailed descriptions of new hardware features and which features are supported on each router, see the "New and Changed Information" section. For descriptions of existing hardware features and supported modules, see the hardware installation guides, configuration and command reference guides, and additional documents specific to Cisco 1700 series routers, which are available on Cisco.com and the Documentation CD at the following location:
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/1700/index.htmThis URL is subject to change without notice. If it changes, point your web browser to CCO, and click the following path:
Cisco Product Documentation: Access Servers and Access Routers: Modular Access Routers: Cisco 1700 Series Routers: <platform_name>Determining Your Software Release
To determine the version of Cisco IOS software currently running on your Cisco 1700 series router, log in to the router and enter the show version EXEC command. The following sample output from the show version command indicates the version number on the second output line:
router> show versionCisco Internetwork Operating System SoftwareIOS (tm) C1700 Software (C1700-Y-MZ), Version 12.2(4)YB, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)Synched to technology version 12.2(5.4)TUpgrading to a New Software Release
For general information about upgrading to a new software release, see
Technical Support for 1700 Series Access Routers.Feature Sets
The Cisco IOS software is packaged in feature sets consisting of software images—depending on the platform. Each feature set contains a specific set of Cisco IOS features. Release 12.2(4)YB supports the same feature sets as Releases 12.2 and 12.2 T, but Release 12.2(4)YB includes new features supported by the Cisco 1700 series routers.
Caution
Table 2 through Table 6 list the features and feature sets supported in Cisco IOS Release 12.2(4)YB:
•
•
•
•
•
The tables use the following conventions:
•
•
•
•
Note
Table 2 Feature List by Feature Set for Cisco 1710 Routers
CAC for VoIP call
No
No
DiffServ for voice signaling traffic
No
No
Cisco IOS Telephony Service
No
No
G.728 codec support
No
No
TCL scripting for IVR
No
No
RTSP enhanced IVR
No
No
T.37 fax relay
No
No
T.38 fax relay
No
No
SIP features 1
No
No
Survivable Remote Site Telephony (SRST)
No
No
MGCP features 2
No
No
Modem pass through over VoIP
No
No
VPN QoS
12.2(4)YB
Yes
Yes
Easy VPN
12.2(4)YA
Yes
Yes
1- & 2-port T1/E1 Multiflex VWIC
No
No
E1 R2 Support
No
No
T1 CAS
No
No
T1/E1 Voice PRI Q.931 and PRI QSIG Protocol
No
No
1- and 2-Port Analog Modem WIC
No
No
G.SHDSL WIC
No
No
1 SIP features include:
1 . Call transfer capabilities using the refer method
1 . Configurable public switched telephone network (PSTN) cause code to SIP response
1 . Gateway support for bind command
1 . ISDN progress indicator support for SIP using 183 session progress
1 . NAT support for SIP
1 . RFC2782 compliance for DNS SRV
1 . Session initiation protocol (SIP)
1 . Session initiation protocol for VoIP enhancements
1 . SIP diversion header implementation for redirecting number
1 . SIP DTMF relay using NTE
1 . SIP gateway support for third party call control
1 . SIP gateway support of RSVP and "tel" URL
1 . SIP intra-gateway hair-pinning
1 . SIP INVITE request with malformed via header
1 . SIP T.38 fax relay
1 . SIP user agent MIB
2 MGCP features include:
•
•
•
•
Table 3 Feature List by Feature Set for Cisco 1721, 1751, and 1760 Routers
CAC for VoIP call
No
No
DiffServ for voice signaling traffic
No
No
Cisco IOS Telephony Service
No
No
G.728 codec support
No
No
TCL scripting for IVR
No
No
RTSP enhanced IVR
No
No
T.37 fax relay
No
No
T.38 fax relay
No
No
SIP features 1
No
No
Survivable Remote Site Telephony (SRST)
No
No
MGCP features 2
No
No
Modem pass through over VoIP
No
No
VPN QoS
12.2(4)YB
Yes
Yes
Easy VPN
12.2(4)YA
Yes
Yes
1- & 2-port T1/E1 Multiflex VWIC
Yes
Yes
E1 R2 Support
No
No
T1 CAS
No
No
T1/E1 Voice PRI Q.931 and PRI QSIG Protocol
No
No
1- and 2-Port Analog Modem WIC3
12.2(4)YB
Yes
Yes
G.SHDSL WIC
12.2(4)XL4
12.2(4)YB5
Yes
Yes
1 For a list of the SIP features, see Table 2, Footnote 1.
2 For a list of the MGCP features, see Table 2, Footnote 2.
3 Release 12.2(4)YB does not support the 1- and 2-Port Analog Modem WIC on the Cisco 1750 router.
4 This feature was introduced on Cisco 1720, 1750, and 1751 routers in Release 12.2(4)XL.
5 This feature was introduced on Cisco 1760 routers in Release 12.2(4)YB.
Table 4 Feature List by Feature Set for Cisco 1720, 1721, 1750, 1751, and 1760 Routers, Part 1 of 2
CAC for VoIP call
No
No
No
No
No
No
DiffServ for voice signaling traffic
No
No
No
No
No
No
Cisco IOS Telephony Service
No
No
No
No
No
No
G.728 codec support
No
No
No
No
No
No
TCL scripting for IVR
No
No
No
No
No
No
RTSP enhanced IVR
No
No
No
No
No
No
T.37 fax relay
No
No
No
No
No
No
T.38 fax relay
No
No
No
No
No
No
SIP features 1
No
No
No
No
No
No
Survivable Remote Site Telephony (SRST)
No
No
No
No
No
No
MGCP features 2
No
No
No
No
No
No
Modem pass through over VoIP
No
No
No
No
No
No
VPN QoS
12.2(4)YB
No
No
Yes
Yes
Yes
Yes
Easy VPN
12.2(4)YA
No
No
Yes
Yes
Yes
Yes
1- & 2-port T1/E1 Multiflex VWIC
Yes
No
Yes
Yes
Yes
Yes
E1 R2 Support
No
No
No
No
No
No
T1 CAS
No
No
No
No
No
No
T1/E1 Voice PRI Q.931 and PRI QSIG Protocol
No
No
No
No
No
No
1- and 2-Port Analog Modem WIC3
12.2(4)YB
Yes
Yes
Yes
Yes
Yes
Yes
G.SHDSL WIC
12.2(4)XL4
12.2(4)YB5
Yes
No
Yes
Yes
Yes
Yes
1 For a list of the SIP features, see Table 2, Footnote 1.
2 For a list of the MGCP features, see Table 2, Footnote 2.
3 Release 12.2(4)YB does not support the 1- and 2-Port Analog Modem WIC on the Cisco 1750 router.
4 This feature was introduced on Cisco 1720, 1750, and 1751 routers in Release 12.2(4)XL.
5 This feature was introduced on Cisco 1760 routers in Release 12.2(4)YB.
Table 4 Feature List by Feature Set for Cisco 1720, 1721, 1750, 1751, and 1760 Routers, Part 2 of 2
CAC for VoIP call
No
No
No
No
No
No
No
DiffServ for voice signaling traffic
No
No
No
No
No
No
No
Cisco IOS Telephony Service
No
No
No
No
No
No
No
G.728 codec support
No
No
No
No
No
No
No
TCL scripting for IVR3
No
No
No
No
No
No
No
RTSP enhanced IVR3
No
No
No
No
No
No
No
T.37 fax relay3
No
No
No
No
No
No
No
T.38 fax relay3
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Survivable Remote Site Telephony (SRST)
No
No
No
No
No
No
No
No
No
No
No
No
No
No
Modem pass through over VoIP
No
No
No
No
No
No
No
VPN QoS
12.2(4)YB
No
No
No
No
No
No
No
Easy VPN
12.2(4)YA
No
No
No
No
No
No
No
1- & 2-port T1/E1 Multiflex VWIC3
12.2(4)YB
Yes
No
No
Yes
No
No
No
E1 R2 Support3
12.2(4)YB
No
No
No
No
No
No
No
T1 CAS3
12.2(4)YB
No
No
No
No
No
No
No
T1/E1 Voice PRI Q.931 and PRI QSIG Protocol3
12.2(4)YB
No
No
No
No
No
No
No
1- and 2-Port Analog Modem WIC3
12.2(4)YB
Yes
Yes
Yes
Yes
Yes
Yes
Yes
G.SHDSL WIC
12.2(4)XL4
12.2(4)YB5
Yes
No
No
Yes
No
No
Yes
1 For a list of the SIP features, see Table 2, Footnote 1.
2 For a list of the MGCP features, see Table 2, Footnote 2.
3 Release 12.2(4)YB does not support the 1- and 2-Port Analog Modem WIC on the Cisco 1750 router.
4 This feature was introduced on Cisco 1720, 1750, and 1751 routers in Release 12.2(4)XL.
5 This feature was introduced on Cisco 1760 routers in Release 12.2(4)YB.
Table 5 Feature List by Feature Set for Cisco 1750 Routers
CAC for VoIP call
12.2(4)XM
No
DiffServ for voice signaling traffic
12.2(4)XM
Yes
Cisco IOS Telephony Service
No
G.728 codec support
12.2(4)XM
Yes
TCL scripting for IVR
12.2(4)XM
No
RTSP enhanced IVR
12.2(4)XM
No
T.37 fax relay
12.2(4)XM
No
T.38 fax relay
12.2(4)XM
No
SIP features 1
12.2(4)XM
No
Survivable Remote Site Telephony (SRST)
No
MGCP features 2
12.2(4)XM
No
Modem pass through over VoIP
12.2(4)XM
No
VPN QoS
No
Easy VPN
No
1- & 2-port T1/E1 Multiflex VWIC3
No
E1 R2 Support3
No
T1 CAS3
No
T1/E1 Voice PRI Q.931 and PRI QSIG Protocol3
No
1- and 2-Port Analog Modem WIC4
No
G.SHDSL WIC
12.2(4)XL5
12.2(4)YB6
Yes
1 For a list of the SIP features, see Table 2, Footnote 1.
2 For a list of the MGCP features, see Table 2, Footnote 2.
3 Release 12.2(4)YB does not support the following features on the Cisco 1750 router: 1- & 2-port T1/E1 Multiflex VWIC, E1 R2 support, T1 CAS, and T1/E1 voice PRI Q.931 and PRI QSIG Protocol.
4 Release 12.2(4)YB does not support the 1- and 2-Port Analog Modem WIC on the Cisco 1750 router.
5 This feature was introduced on Cisco 1720, 1750, and 1751 routers in Release 12.2(4)XL.
6 This feature was introduced on Cisco 1760 routers in Release 12.2(4)YB.
Caution
Table 6 Feature List by Feature Set for Cisco 1751 and 1760 Routers, Part 1 of 3
CAC for VoIP call
12.2(4)XM
No
Yes
No
Yes
No
Yes
DiffServ for voice signaling traffic
12.2(4)XM
No
Yes
No
Yes
No
Yes
Cisco IOS Telephony Service1
No
Yes
No
Yes
No
Yes
G.728 codec support
12.2(4)XM
No
Yes
No
Yes
No
Yes
TCL scripting for IVR
12.2(4)XM
No
Yes
No
Yes
No
Yes
RTSP enhanced IVR
12.2(4)XM
No
Yes
No
Yes
No
Yes
T.37 fax relay
12.2(4)XM
No
Yes
No
Yes
No
Yes
T.38 fax relay 2
12.2(4)XM
No
Yes
No
Yes
No
Yes
12.2(4)XM
Yes
Yes
Yes
Survivable Remote Site Telephony (SRST)
No
Yes
No
Yes
No
Yes
MGCP features4
12.2(4)XM
No
Yes
No
Yes
No
Yes
Modem pass through over VoIP
12.2(4)XM
No
Yes
No
Yes
No
Yes
VPN QoS
12.2(4)YB
Yes
Yes
Yes
Yes
Yes
Yes
Easy VPN
12.2(4)YA
Yes
Yes
Yes
Yes
Yes
Yes
1- & 2-port T1/E1 Multiflex VWIC
12.2(4)YB
No
Yes
No
Yes
No
Yes
E1 R2 Support
12.2(4)YB
No
Yes
No
Yes
No
Yes
T1 CAS
12.2(4)YB
No
Yes
No
Yes
No
Yes
T1/E1 Voice PRI Q.931 and PRI QSIG Protocol
12.2(4)YB
No
Yes
No
Yes
No
Yes
1- and 2-Port Analog Modem WIC
12.2(4)YB
Yes
Yes
Yes
Yes
Yes
Yes
G.SHDSL WIC
No
No
No
No
No
No
1 In Cisco IOS Release 12.2(2)XT, the feature name "Cisco IP Keyswitch Version 2.0" changed to "Cisco IOS Telephony Service Version 2.0" and the command mode changed from "keyswitch-configuration mode" to "telephony-service configuration mode".
2 This feature is supported on Cisco 1760 routers on Release 12.2(4)YB and above only. Release 12.2(4)XM does not support this feature on Cisco 1760 routers.
3 For a list of the SIP features, see Table 2, Footnote 1.
Table 6 Feature List by Feature Set for Cisco 1751 and 1760 Routers, Part 2 of 3
xDSL/VOX IPSec 3DESCAC for VoIP call
12.2(4)XM
No
Yes
No
Yes
No
Yes
DiffServ for voice signaling traffic
12.2(4)XM
No
Yes
No
Yes
No
Yes
Cisco IOS Telephony Service1
No
Yes
No
Yes
No
Yes
G.728 codec support
12.2(4)XM
No
Yes
No
Yes
No
Yes
TCL scripting for IVR
12.2(4)XM
No
Yes
No
Yes
No
Yes
RTSP enhanced IVR
12.2(4)XM
No
Yes
No
Yes
No
Yes
T.37 fax relay
12.2(4)XM
No
Yes
No
Yes
No
Yes
T.38 fax relay 4
12.2(4)XM
No
Yes
No
Yes
No
Yes
12.2(4)XM
No
Yes
No
Yes
No
Yes
Survivable Remote Site Telephony (SRST)
No
Yes
No
Yes
No
Yes
12.2(4)XM
No
Yes
No
Yes
No
Yes
Modem pass through over VoIP
12.2(4)XM
No
Yes
No
Yes
No
Yes
VPN QoS
12.2(4)YB
Yes
Yes
Yes
Yes
Yes
Yes
Easy VPN
12.2(4)YA
Yes
Yes
Yes
Yes
Yes
Yes
1- & 2-port T1/E1 Multiflex VWIC
12.2(4)YB
No
Yes
No
Yes
No
Yes
E1 R2 Support
12.2(4)YB
No
Yes
No
Yes
No
Yes
T1 CAS
12.2(4)YB
No
Yes
No
Yes
No
Yes
T1/E1 Voice PRI Q.931 and PRI QSIG Protocol
12.2(4)YB
No
Yes
No
Yes
No
Yes
1- and 2-Port Analog Modem WIC
12.2(4)YB
Yes
Yes
Yes
Yes
Yes
Yes
G.SHDSL WIC
Yes
Yes
Yes
Yes
Yes
Yes
1 In Cisco IOS Release 12.2(2)XT, the feature name "Cisco IP Keyswitch Version 2.0" changed to "Cisco IOS Telephony Service Version 2.0" and the command mode changed from "keyswitch-configuration mode" to "telephony-service configuration mode".
2 This feature was introduced on Cisco 1751 routers in Release 12.2(2)XT.
3 This feature was introduced on Cisco 1760 routers in Release 12.2(4)YB.
4 This feature is supported on Cisco 1760 routers on Release 12.2(4)YB and above only. Release 12.2(4)XM does not support this feature on Cisco 1760 routers.
5 For a list of the SIP features, see Table 2, Footnote 1.
Table 6 Feature List by Feature Set for Cisco 1751 and 1760 Routers, Part 3 of 3
CAC for VoIP call
12.2(4)XM
No
Yes
No
Yes
Yes
No
Yes
DiffServ for voice signaling traffic
12.2(4)XM
No
Yes
No
Yes
Yes
No
Yes
Cisco IOS Telephony Service1
No
Yes
No
Yes
Yes
No
Yes
G.728 codec support
12.2(4)XM
No
Yes
No
Yes
Yes
No
Yes
TCL scripting for IVR
12.2(4)XM
No
Yes
No
Yes
Yes
No
Yes
RTSP enhanced IVR
12.2(4)XM
No
Yes
No
Yes
Yes
No
Yes
T.37 fax relay
12.2(4)XM
No
Yes
No
Yes
Yes
No
Yes
T.38 fax relay 4
12.2(4)XM
No
Yes
No
Yes
Yes
No
Yes
12.2(4)XM
No
Yes
No
Yes
Yes
No
Yes
Survivable Remote Site Telephony (SRST)
No
Yes
No
Yes
Yes
No
Yes
12.2(4)XM
No
Yes
No
Yes
Yes
No
Yes
Modem pass through over VoIP 4
12.2(4)XM
No
Yes
No
Yes
Yes
No
Yes
VPN QoS
12.2(4)YB
No
No
No
No
No
No
No
Easy VPN
12.2(4)YA
No
No
No
No
No
No
No
1- & 2-port T1/E1 Multiflex VWIC
12.2(4)YB
No
Yes
No
Yes
Yes
No
Yes
E1 R2 Support
12.2(4)YB
No
Yes
No
Yes
Yes
No
Yes
T1 CAS
12.2(4)YB
No
Yes
No
Yes
Yes
No
Yes
T1/E1 Voice PRI Q.931 and PRI QSIG Protocol
12.2(4)YB
No
Yes
No
Yes
Yes
No
Yes
1- and 2-Port Analog Modem WIC
12.2(4)YB
Yes
Yes
Yes
Yes
Yes
Yes
Yes
G.SHDSL WIC
12.2(4)XL7
12.2(4)YB3
Yes
Yes
Yes
Yes
Yes
Yes
No
1 In Cisco IOS Release 12.2(2)XT, the feature name "Cisco IP Keyswitch Version 2.0" changed to "Cisco IOS Telephony Service Version 2.0" and the command mode changed from "keyswitch-configuration mode" to "telephony-service configuration mode".
2 This feature was introduced on Cisco 1751 routers in Release 12.2(2)XT.
3 This feature was introduced on Cisco 1760 routers in Release 12.2(4)YB.
4 This feature is supported on Cisco 1760 routers on Release 12.2(4)YB and above only. Release 12.2(4)XM does not support this feature on Cisco 1760 routers.
5 For a list of the SIP features, see Table 2, Footnote 1.
6 For a list of the MGCP features, see Table 2, Footnote 2.
7 This feature was introduced on Cisco 1720, 1750, and 1751 routers in Release 12.2(4)XL.
New and Changed Information
The following sections list the new hardware and software features supported by the Cisco 1700 series routers for Release 12.2(4)YB.
New Hardware Features in Release 12.2(4)YB
The following sections describe the new hardware features supported by the Cisco 1700 series routers for Release 12.2(4)YB.
1- and 2-Port Analog Modem WIC
Release 12.2(4)YB supports 1- and 2-port analog modem WAN Interface Cards (with part numbers WIC-1AM and WIC-2AM, respectively) on Cisco 1720, 1721, 1751, and 1760 routers. The interface cards provide basic telephone service connectivity for remote router management; asynchronous Dial-on-Demand Routing (DDR) and dial backup; dial- and fax-out modem access; and low-density remote access server (RAS) services.
This feature supports the following functionality:
•
•
•
•
1- and 2-Port T1/E1 Multiflex Voice/WAN Interface Card
Release 12.2(4)YB introduces 1- and 2-port T1/E1 Multiflex Voice/WAN interface cards (VWICs) to provide basic structured and unstructured service for T1 or E1 networks on the Cisco 1700 series routers. These VWIC interface cards (voice interface card [VIC] + WAN interface card [WIC]) combine the accessibility of a WIC and the functionality of a VIC, to deliver a multi-service solution that integrates voice and data over a single circuit.
The following T1/E1 VWICS are available for the Cisco 1751 and Cisco 1760 routers:
•
•
•
•
•
•
•
•
Note
The T1 and E1 VWICs provide individual DS0s or channels of a DS1 circuit to be grouped together to create channel groups. For example, the first 12kb to 64kb channels of a T1 circuit could form a channel group for signals sent to a frame relay network.
Drop and Insert (DI) VWICs have two T1/E1 ports. In addition to the functionality described above, the DI VWICs enable specified DS0 channels from one port to be directly cross-connected to another port. For example, the first three DS0s of one port can be directly cross-connected to the first three DS0s of a second port. The remaining DS0s can support signals to or from other interfaces on the router. DI VWICs provide easy multiplexing of voice and data over a single circuit, within two locals ports of a T1/E1 DI VWIC.
The G.703 VWICs support unframed and framed E1 circuits. Other E1 WICs support only framed E1 circuits.
With these Multiflex VWICs, Cisco 1751 and Cisco 1760 routers support fractional and full T1/E1 services and channelized T1/E1 voice services; that is: support for channel associated signaling on the T1 interface, E1 R2, T1/E1 Voice PRI Q.931, and PRI QSIG protocol. For additional information, see the section "Channelized Voice, Fractional, and Full T1 and E1 Services."
G.SHDSL WAN Interface
Release 12.2(4)YB supports the G-standard Symmetrical High bit-rate Digital Subscriber Loop (G.SHDSL) WAN interface card on Cisco 1760 series routers.
Note
New Software Features in Release 12.2(4)YB
The following sections describe the new software features supported by the Cisco 1700 series routers for Release 12.2(4)YB.
Cisco IOS Telephony Service
Release 12.2(4)YB supports the Cisco IOS Telephony Service (ITS) feature on Cisco 1760 routers. The Cisco IOS Telephony Service feature, a part of IP Telephony Services, provides basic Cisco IP phone call-handling capabilities in a LAN environment on the Cisco routers.
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This feature enables the Cisco multiservice routers to provide Cisco IOS Telephony Service for the Cisco IP Phone 7960, Cisco IP Phone 7940, Cisco IP Phone 7910, and Cisco IP Conference Station 7935. Cisco IOS Telephony Service also helps download phone software images and configures and manages the Cisco IP phones in a LAN, to accommodate the telephony system of a small office with a small number of extensions.
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For more information, see the document Cisco IOS Telephony Service:
http://www.cisco.com/univercd/cc/td/doc/product/access/ip_ph/srs/index.htmChannelized Voice, Fractional, and Full T1 and E1 Services
Release 12.2(4)YB includes the following software features to support the 1- and 2-port T1/E1 Multiflex VWICs, as described in the section "New Hardware Features in Release 12.2(4)YB":
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CAS is a form of signaling used on a T1 line. With CAS, a signaling element is dedicated to each channel in the T1 frame. This type of signaling is sometimes called Robbed Bit signaling (RBS) because a bit is taken out (or robbed) from the user data stream to provide signaling information to and from the switch. The T1 CAS feature enables T1 VWICs to receive and transmit incoming and outgoing call signaling (such as on-hook and off-hook) through each T1 controller that is configured for a channelized T1 line.
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Release 12.2(4)YB supports R2 signaling, which provides gateway functionality between the real-time circuit-switched world (PSTN) and the packet-switched-data networks. The R2 signaling is an international signaling standard that is common to channelized E1 networks. There is no single standard for R2 signaling. The ITU-T Q.400-Q.490 recommendation defines R2, but a number of countries implement R2 in entirely different ways. Cisco 1751 and Cisco 1760 routers use E1 R2 signaling to communicate with central office trunks that also use E1 R2 signaling.
Release 12.2(4)YB supports the following implementations of R2 signaling:
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The QSIG protocol provides signaling for Private Integrated services Network Exchange (PINX) devices. It is based on the ISDN Q.931 standard. By supporting PRI QSIG voice signaling, Cisco 1751 and Cisco 1760 routers can connect with digital PBXs that use the QSIG form of Common Channel Signaling (CCS). PRI QSIG signaling provides transparent support for supplementary PBX services so that proprietary PBX features are not lost when connecting PBXs to Cisco 1751 and Cisco 1760 networks.
Quality of Service for Virtual Private Networks
When packets are encapsulated by tunnel or encryption headers, Quality of Service (QoS) features are unable to examine the original packet headers and correctly classify the packets. Packets traveling across the same tunnel have the same tunnel headers, so the packets are treated identically if the physical interface is congested.
With the growing popularity of Virtual Private Networks (VPNs), the need to classify traffic within a traffic tunnel is gaining importance. QoS features have historically been unable to classify traffic within a tunnel. With the introduction of the Quality of Service for Virtual Private Networks (QoS for VPNs) feature, packets can now be classified before tunneling and encryption occur. The process of classifying features before tunneling and encryption is called preclassification.
The QoS for VPNs feature is designed for tunnel interfaces. When the new feature is enabled, the QoS features on the output interface classify packets before encryption, allowing traffic flows to be adjusted in congested environments. The end result is more effective packet tunneling.
The QoS for VPNs feature provides a solution for making Cisco IOS Quality of Service services operate in conjunction with tunneling and encryption on an interface. Cisco IOS software can classify packets and apply the appropriate QoS service before the data is encrypted and tunneled. In addition, when packets are marked using the IP Type of Service byte or differentiated services code point (DSCP) values, the markings are copied to the new, encrypted packet. This allows the service provider to treat mission critical or multi-service traffic with higher priority across their network.
New Software Features Supported on Cisco 1760 Routers
Release 12.2(4)YB supports the following software features on Cisco 1760 routers:
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For SRST configuration information, see the Survivable Remote Site Telephony publication on Cisco.com and the Documentation CD at the following location:
http://www.cisco.com/univercd/cc/td/doc/product/access/ip_ph/srs/This URL is subject to change without notice. If it changes, point your web browser to CCO, and click the following path:
Cisco Product Documentation: Access Servers and Access Routers: IP Phone Features:For Cisco IOS telephony service configuration information, see the Cisco IOS Telephony Service publication on Cisco.com and the Documentation CD at the following location:
http://www.cisco.com/univercd/cc/td/doc/product/access/ip_ph/ip_ks/ipkey2.htmThese URLs are subject to change without notice. If they change, point your web browser to CCO, and click the following path:
Cisco Product Documentation: Access Servers and Access Routers: IP Phone Features: [Cisco IOS Telephony Service or Survivable Remote Site Telephony]Network Timing Recovery
Release 12.2(4)YB supports Network Timing Recovery (NTR) for configuring the clock source and associated dependencies on Cisco 1751 and Cisco 1760 routers. For configuration information, see the publication TDM Clock Configuration for Cisco 1700 Series Routers. This document is available on CCO and on the Cisco Documentation CD.
New Software Features in Release 12.2(4)T
For information regarding the features supported in Cisco IOS Release 12.2 T, refer to the Cross-Platform Release Notes and New Feature Documentation links at the following location on CCO:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122relnt/xprn122t/index.htm
This URL is subject to change without notice. If it changes, point your web browser to CCO, and click the following path:
Service & Support: Technical Documents: Cisco IOS Software: Release 12.2: Release Notes: Cross-Platform Release Notes (Cisco IOS Release 12.2T)
Limitations
The following restrictions in Release 12.2(4)YB apply to channelized voice, fractional, and full T1 and E1 services:
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Important Notes
The following sections contain important notes about Cisco IOS Release 12.2(4)YB that can apply to the Cisco 1700 series routers. (Also, see the "Caveats" section.)
1- and 2-Port Analog Modem WIC
The following issues apply to the 1- and 2-Port Analog Modem WIC:
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Fan Operation in Cisco 1700 Series Routers
Cisco 1760 and 1760-V router fans are always on and Cisco 1710 routers do not contain a fan. However, the fans in Cisco 1720, 1721, 1750, and 1751 routers stay off until thermally activated.
Flash defaults to Flash:1 on Multipartition Flash
When using a multipartition flash card, the various flash partitions are referred to as "flash:1:", "flash:2:", etc. If you specify only "flash" in a multipartition flash, the parser assumes "flash:1:." For example, if you enter show flash all the parser defaults to "show flash:1: all" and only the flash information for the first partition displays. To see information for all flash partitions, enter show flash ?. This will list all of the valid partitions. Then enter show flash:xx: all on each valid partition.
Peak Cell Rate and Sustainable Cell Rate Values
On Cisco 1700 routers, specify the Peak Cell Rate (PCR) and Sustainable Cell Rate (SCR) as multiples of 32 Kbps. Other rates are treated as the next lower value of a multiple of 32. For example, an entered PCR value of 150 is considered 128.
Using the "boot flash" and "boot system tftp" Commands
Booting a Cisco 1700 series router with the commands boot flash or boot system flash results in unpredictable behavior. To work around this problem, be sure to enter a colon (:) following both commands (for example, boot flash: or boot system flash:.)
Booting a Cisco 1700 series router using the command boot system tftp might not work due to insufficient memory. To work around this problem, use the command tftpdnld from the ROM monitor. This error is caveat number CSCdv87983.
Caveats
Caveats describe unexpected behavior or defects in Cisco IOS software releases. Severity 1 caveats are the most serious caveats, severity 2 caveats are less serious, and severity 3 caveats are the least serious of these three severity levels.
Caveats in Release 12.2 T are also in Release 12.2(4)YB. For information on caveats in Cisco IOS Release 12.2 T, refer to the Caveats for Cisco IOS Release 12.2 T document. For information on caveats in Cisco IOS Release 12.2, refer to the Caveats for Cisco IOS Release 12.2 document. These documents list severity 1 and 2 caveats, and are located on CCO and the Documentation CD.
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Resolved Caveats - Release 12.2(4)YB
This section describes unexpected behavior that is fixed in Release 12.2(4)YB.
Management
CSCdw65903
An error can occur with management protocol processing. Please use the following URL for further information:
http://www.cisco.com/cgi-bin/bugtool/onebug.pl?bugid=CSCdw65903
Unresolved Caveats - Release 12.2(4)YB
This section describes unexpected behavior in Release 12.2(4)YB.
Miscellaneous
CSCdv87983
Booting a Cisco 1700 series router using the command boot system tftp might not work due to insufficient memory. To work around this problem, use the command tftpdnld from the ROM monitor.
Multiservice Applications
CSCdw86539
To properly shutdown MGCP, first shut the voice port associated with MGCPAPP and then issue the command no mgcp. If the voice port is not shut, issuing the command no mgcp causes MGCP processes to shut down incorrectly. This has been observed when RQNT with embedded notifications is issued by the call agent.
CSCdw84683
A failure occurs if you attempt to make fax calls (T.38 or passthrough) through MGCP. Although some fax calls might be sent through the speed-up mechanism successfully, subsequent fax calls might fail. A workaround is to use G.711 as the codec with fax passthrough.
Voice
CSCdv25550
Excessive CRC errors might occur if traffic passes over a T1/E1 interface before the router is completely booted up. To work around this problem, clear the counters.
CSCdw73302
The default IVR applies to the configured translation rule multiple times. In other words, when using a TCL IVR 2.0 application on a Cisco voice gateway for two-stage calls, the configured translation rule might be applied for each received digit instead of for the initial digit only.
CSCdw85359
When the station-id on an FXO port is not set, the Caller-ID displays "From Private...." instead of the actual number for a local transfer call. To display the correct output, configure the station-id on the FXO port of the ITS router.
CSCdw86971
The call-forward-no-answer of an inbound VoIP call—via a loopback-dn to a local IP phone that is forwarded on no-answer to a remote VoIP target to create a VoIP hairpin on the loopback—results in no voice path when the forwarded call is answered.
WAN
CSCdv33932
When using the ATM-MIB on a Cisco 1700 series router with a G.SHDSL WAN interface card, the object table aal5VccTable does not become populated. Performing an SNMP query returns no response.
Related Documentation
The documentation available for the Cisco 1700 series routers typically consists of hardware and software installation guides, Cisco IOS configuration and command references, system error messages, feature modules, and other documents. Documentation is available as printed manuals or electronic documents, except for feature modules, which are available online on Cisco.com and the Documentation CD. Use these release notes with the related documents listed in the sections: "Release-Specific Documents" and "Platform-Specific Documents."
Additionally, the Cross-Platform Release Notes for Cisco IOS Release 12.2 T contains the latest descriptions and locations of the following types of documents. See the section "Release-Specific Documents," for the location of the Cross-Platform Release Notes for Cisco IOS Release 12.2 T.
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Release-Specific Documents
The following documents are specific to Release 12.2 and apply to Release 12.2(4)YB. They are located on Cisco.com and the Documentation CD (under the heading Service & Support):
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Technical Documents: Cisco IOS Software: Release 12.2: Release Notes: Cisco 1700 Series Routers: Cisco 1700 Series - Release Notes for Release 12.2(4)YB
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Technical Documents: Cisco IOS Software: Release 12.2: Release Notes: Cisco IOS Release 12.2 T
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Technical Documents: Product Bulletins
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Technical Documents: Cisco IOS Software: Release 12.2: Caveats
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Platform-Specific Documents
Hardware installation guides, configuration and command reference guides, and additional documents specific to Cisco 1700 series routers are available on Cisco.com and the Documentation CD at the following location:
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/1700/index.htm
This URL is subject to change without notice. If it changes, point your web browser to CCO, and click the following path:
Cisco Product Documentation: Access Servers and Access Routers: Modular Access Routers: Cisco 1700 Series Routers: <platform_name>
Obtaining Documentation and Technical Assistance
The Cross-Platform Release Notes for Cisco IOS Release 12.2 T contains the latest descriptions and locations of the following sources for obtaining documentation and technical assistance from Cisco Systems. See the section "Release-Specific Documents" for the location of the Cross-Platform Release Notes for Cisco IOS Release 12.2 T.
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