Re: What is the recommended Delay/Latency between Call manager a
Bandwidth would depend on the codec being used for calls destined to or from SRST gateway as well as the number of phones / calls that is supports. Example , a g711 call would take around 80 kbps while a g729 would take around 24 kbps bandwidth.
I've been struggling to get this information and what I could understand from the SRND is that this 80ms is just related to the Intra-Cluster communications (Between Servers UCS), there is no relation with SRST Gateways:
"The maximum one-way delay between any two Unified CM servers should not exceed 40 ms, or 80 ms round-trip time."
From that I assume that the RTD between the SRST and the Cluster should be based on the affirmation below:
"If a voice service is hosted across a WAN where the one-way latency is 200 ms, for example, users might experience issues such as delay-to-dialtone or increased media cut-through delays. For other services such as presence, there might be no problem with a 200 ms latency."
This doc is what Cisco and other telephony companies use for a benchmark. 150ms is one-way delay is the limit before the experience starts breaking down. Latency that is greater than this effects performance not just for the call quality, but also for call setup, DTMF tones, call features during the call, and termination.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
endpoints and other SIP related issues. Even though these traces are in
clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
CUCM Database Replication is an area in which Cisco customers and
partners have asked for more in-depth training in being able to properly
assess a replication problem and potentially resolve an issue without
involving TAC. This document discusses the bas...