SIP Line Messaging Guide (Standard Edition) for Cisco Unified Communications Manager - SIP Standard Line Interface

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/sip_msg/line_std/12_0_1/cucm_b_sip-line-messaging-standard-1201/cucm_b_sip-line-messaging-standard-1201_chapter_00.html

Published

unknown

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

Cisco documentation terms; no-redistribution; short excerpts and locators only

Source notes citing this source

• The CUCM 12.0(1) SIP line messaging guide says a SIP phone hosting a locally mixed three-way call can drop out and connect the remaining two parties using REFER with an embedded Replaces. in context
• The CUCM 12.0(1) SIP line messaging guide says the SIP line side supports hold both by RFC 2543 c=0 and by RFC 3261/3264 sendonly or inactive. in context

Cite this source record

APA

WarmTransfer. (2026, September 24). SIP Line Messaging Guide (Standard Edition) for Cisco Unified Communications Manager - SIP Standard Line Interface. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-cucm-sip-line-msg-guide-1201

BibTeX

@misc{warmtransfer-cisco-cucm-sip-line-msg-guide-1201,
  title  = {SIP Line Messaging Guide (Standard Edition) for Cisco Unified Communications Manager - SIP Standard Line Interface},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-cucm-sip-line-msg-guide-1201},
  note   = {Cisco Systems, accessed 2026-09-24}
}