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.