Overview
The fax detection feature detects whether an inbound call is from a fax machine. If the inbound call is from a fax machine, the call is rerouted appropriately.
Feature Information for Fax Detection for SIP Call and Transfer
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
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Feature Name |
Releases |
Feature Information |
---|---|---|
Fax Detection for SIP Call and Transfer |
Cisco IOS 15.4(2)T |
Fax detection is the capability to detect automatically whether an incoming call is voice or fax. For calls coming from an IP trunk to CUBE, the Fax Detection for SIP Call and Transfer feature is used to detect CNG tones (calling tones) so that the fax server can handle the actual fax transmission or redirect the fax call to a configured fax number. The following commands were introduced: cng-fax-detect and detect-fax mode . |
Fax Detection for SIP Call and Transfer on Cisco IOS XE Platforms |
Cisco IOS XE Amsterdam 17.2.1r |
Support was introduced for SIP call and transfer for IP-to-IP calls on Cisco IOS XE platforms for Cisco Unified Border Element. |