Looking for assistance with determining the "max" number of calls that system can recieve
before issuing a busy signal to the end user. This is for external callers. Primary Voice Engineer is no longer at our company and I'm trying to fill in. Therefore, only have the basic info. Have a 2851 with a Voice PRI; and then there is a Voice T1 also connected to this router. In theory I believe it was suppose to failover to the T1 if the PRI filled out. Need to verify this. Running on CCM 7.1.2; code on 2851 is 12.4(7g). Also using version 8.1 of RTMT.
Just to add a little note to the great tips from Art (+5 points Art!)
The theoretical number of Incoming calls on a PRI +T1 combination would be 47
(23 on the PRI and 24 on the T1) then subtract the number of Outgoing
calls at any given time (as these are likely shared between Incoming/Outgoing)
and you have your number. As you can see this number is fluid as the Incoming/Outgoing
call flows continually change
It will be helpful to know if these are MGCP or H323, or you can cover both by setting up RTMT like the attached scrape. Also you can run show call active voice on the gateway to see how many active telephony call legs are up, which equals PRI or CAS channels in use.