I`m designing a CME with 2851 ISR Router. It has 96 IP Phones and a E1 interface to the PSTN (30 voice channels). I have a issue calculating a DSP resources. I will like to know a cisco document who talks about the DSP calculator. I`ve used the DSP Calculator tool but the issue is that it ask me about the number of transcoding and coferences... I`m not sure how many I should put there.
My scenario is: CCME 2851 with 96 IP Phones and a E1 interface to the PSTN on the central site and remote site CCME 2811 with 36 IP phones and a E1 interface to the PSTN. I will like to have cominications between these CCME, conference and conference to the PSTN. I`m going use a H323 with codec G729 to doesn`t oversubscribe the link.
You will need to estimate how many concurrent instances of conferences which include a party from over the WAN (or from the PSTN transferred over the WAN).
You will also need to estimate how many calls will come in through the PSTN at one site and be transferred to the other site.
These are two scenarios that are likely to incur additional DSP usage.
Each E1 interface if full used (30 channels) with G711 calls would require 30 channels of DSP. If a call is using G729 then it will use 2 channels of DSP (60 channels total) - your number will be somewhere in the middle...
Given your number of users, I would put a PVDM2-64 in each site - this should allow for a few analogue ports in addition to the E1 and leave a good few channels for events where G729 is used in conferences or diverted to VM.
If you know you will have a lot of intersite traffic then maybe slip some extra in..
Please rate helpful posts
Please remember to rate helpful posts to identify useful responses, and mark 'Answered' if appropriate!
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...