Modem Issue on 8720 CM3.1 1

[Definity]

I have a 8720 installed with remote G650 gateways connected over the MPLS network. We have AT&T & Teleglobe PRI's connected on the remote gateway's (2 seperate gateways). We have the analog card connected on the local gateway. The modem connects on the analog card.

We are having problems with Modem connection to different centres where people use to make modem calls. he connection drops very frequently, & most of the times we get junk characters to some of the sites. The connection to the same sites (same numbers) using direct lines works absolutely fine. But when called using the 8720 & remote gateways with PRI's gives us intermittent issues. Have upgraded the firmware on the Xfire boards but no success.

 

[cycledick]

Check to make sure you have a synch source for each port network. If synch is off, you'll usually see it reflected in faxes and modems first.

If that's fine, check the fax and modem settings on the second page of the ip-codec screen. I'm not sure what it SHOULD be, but I'd try there and see if you can get any change.

 

[CBB]

Paste page two of the codec you are using.

 

[Definity]

On the ip-codec set, we already have setup the modem calls as 'pass-through' calls. The sync source is defined as the Primary T1 of the NFAS group. Also, we didn't see any sync alarms for the DS1's in use.

 

[Definity]

On the ip-codec set, we already have setup the modem calls as 'pass-through' calls. The sync source is defined as the Primary T1 of the NFAS group. Also, we didn't see any sync alarms for the DS1's in use.
IP codec set is as below:-
IP Codec Set



Allow Direct-IP Multimedia? n





Mode Redundancy

FAX relay 0

Modem pass-through 0

TDD/TTY off 0

Clear-channel n 0

 

[CBB]

Yeah, Pass-through is what has worked for me.

 

[cycledick]

So, you have a synch source for each port-network (display synchronization port-network 1 [or 2 or 3])?

 

[Definity]

Yes, each port network has a sync source as a DS1 & if there is no DS1 in port network, Tone-BD is the sync source.

 

[cycledick]

What about firmware on IPSIs, CLANS? Are they the latest? Avaya always says to upgrade EVERYTHING (IPSIs, CLANs, Analog Cards, DS1s, etc) to see if that fixes it.

If everything is up-to-date, and your synch source are working properly, I'm out of ideas.