UC500 and FXO ports

[a.gooding]

Guys,

strange one i encountered this month. we have done a UC500 48 user with a 8 port FXO setup. we have 4 lines connected to a GSM gateway and 1 to a Land line.

ive received two calls in the past two weeks from the customer stating that they cannot make outgoing or receive incoming calls (The GSM is thier primary incoming/Outgoing).

i checked today and sure enough i ring in the PSTN number, it goes of hook and then silence. They cannot make any outgoing calls either.(they get unknown number and then busy)

Note: i can dial into the LAND line number and everything is fine.

Now ive checked parameters, timeouts etc. when the issue is occuring i even disconnected the GSM gateway and plugged in an analog phone directly and it works. ive disabled caller id and shut no shut the ports as well.

i have also shut no shut all ports and nothing fixes it. the only FIX is a reboot of the entire system. im sure its going to fail in the next couple of days again.

i did a vpm signal debug and what its telling me is that it cannot connect the fxo port to the DSP channel.

my first step is to upgrade the IOS which im actually about to do but i was wondering if anyone had similar issues?

any assistance would as always be greatly appreciated.

[matthew.cameron]

wow thanks for the reply, I wasn't sure if I would see anything here.

We have replaced the UC540, our situtation is a little different thought. We have an extra VIC2 card with 4 additional FXO port being used for incoming PSTN lines from an internal hospital PBX.

I have read about the timing supervisory disconnect and we will give that a shot too.

I have a feeling some type of singaling makes the FXO ports freeze up. A restart is the onlything that works.

I am working with level 2 TAC now and will try the above mentioned. Much appreciated.

[a.gooding]

No probs,

shoot us a post if you did get it resolved. This one stumped us for a while and the customer was about the throw the box away

good luck and ill respond once i can