Commonly Supported Fax/Modem Call Flows

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/support/docs/voice/t38/215863-commonly-supported-fax-modem-call-flows.html

Published

2020-07-29

Updated

unknown

Accessed

2026-10-02

HTTP status

200

License

Cisco proprietary; all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• Unlike audio, fax protocols cannot be transcoded, so a T.38 leg cannot be converted to a G.711 pass-through leg mid-path by a Cisco device. in context
• For a fax call to succeed across a Cisco VoIP path, every device on the VoIP path must use the same fax protocol and the same switchover mechanism (NSE or protocol-based). in context

Cite this source record

APA

WarmTransfer. (2020, July 29). Commonly Supported Fax/Modem Call Flows. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-technote-215863-fax-modem-call-flows

BibTeX

@misc{warmtransfer-cisco-technote-215863-fax-modem-call-flows,
  title  = {Commonly Supported Fax/Modem Call Flows},
  author = {{WarmTransfer}},
  year   = {2020},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-technote-215863-fax-modem-call-flows},
  note   = {Cisco Systems, accessed 2026-10-02}
}