2013年3月15日 · Cisco Unified CME 8.6 supports the CFU feature on SIP IP phones using the call-forward b2bua unregistered command under voice register dn tag. The CFU feature supports overlap dialing and en-bloc dialing. A call to a floating DN is forwarded to its CFU destination, if configured. Calls to a DN

2014年1月25日 · On UCCE Configuration Manager -> Network VRU for the CVP NVRU configure different labels for CVP Call Servers and CUCM routing clients. Add the CVP Call Server label to the Send To Originator list on CVP Call Server SIP tab. Create a local static route for the CUCM label to send the call to one VXML GW.

2016年12月1日 · Cisco Unified CME 8.6 supports the CFU feature on SIP IP phones using the call-forward b2bua unregistered command under voice register dn tag. The CFU feature supports overlap dialing and en-bloc dialing.

2024年7月19日 · B2BUA（Back-to-Back User Agent，背靠背用户代理）是通讯网络中，使用SIP（Session Initiation Protocol，会话发起协议）实现会话的一种逻辑实体。 B2BUA作为SIP呼叫两端的用户代理，负责处理呼叫两端的所有SIP信令，从呼叫确立到终止全程跟踪每个呼叫。

2023年8月24日 · cube和cucm是b2bua。这意味着它们既可以发起请求，又可以同时提供对请求的响应。b2bua结合了uac和uas的功能。uac是发起请求的用户代理客户端，而uas是生成请求响应的用户代理服务器。 代理服务器会中继请求和响应，因此cube不是代理服务器。

2019年10月1日 · For example, a B2BUA should insert a Max-Forwards header field. We can edit the max forward value on the SIP trunk by going into sip ua and then editing the max forward value there.

2014年6月17日 · The B2BUA Encryption component is disconnected after ~3 seconds. The disconnect reason is: B2BUA disconnected call on the ingress saying "mismatched transport type in answer". Based on context clues, this points to TLS negotiation.

Cisco Unified SIP SRST provides backup to an external SIP proxy server by providing basic registrar and redirect server services earlier than Cisco Unified SIP SRST version 3.4 or B2BUA for Cisco Unified SIP SRST version 3.4 and higher services.

To configure SIP-to-SIP call forwarding using a back-to-back user agent (B2BUA) which allows call forwarding on any dial peer, perform the following steps. Prerequisites • Connections between specific types of endpoints in a Cisco IP-to-IP gateway must be configured by using the allow-connections command.

SIP Basics –CUCM/CUBE –Back to Back User Agent (B2BUA) 13 A B2BUA is similar to a stateful SIP Proxy Server in that it actively maintains call state, but does not have the same limitations as a SIP Proxy server. i.e. a B2BUA can disconnect a call and modify media information sent in the Session Description Protocol (SDP). Why is CUCM a B2BUA ?