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Community Member

Limited PSTN calls on CUCM 8.6

Hi

I am facing an issue with maximum simultaneous PSTN calls in our office. We are currently running CUCM 8.6 with VGW 2801 router; 8 FXO lines. All lines are working fine. At any given time, I am able to use only max 5 lines for PSTN calls (incoming and outgoing included). The 6th call onwards gives a busy tone. Attached is the VGW config.

Any advice is appreciated.

Thanks

Binu

4 REPLIES

Limited PSTN calls on CUCM 8.6

About the 6th port/line onwards, will it always be the same port, blocking the call or randomly the 6th, 7th & 8th calls ( no matter which port it goes thru ) are dropped ?

Did you collect any debug outputs ?

Community Member

Limited PSTN calls on CUCM 8.6

Hi Gajanan

I haven't collected any debugs yet.

It is not always the same port. The problem persists on any port, in no order of ports.

Community Member

Limited PSTN calls on CUCM 8.6

Please,provide screen from Gateway Config_MGCP from your CM.

Also please pay attention to your Route groups...

Hall of Fame Super Silver

Limited PSTN calls on CUCM 8.6

Have you attempted to reset the port?

Can you tried changing the trunk-group order to move the port to be the last one used?

Is this an FXO or FXS/DID line, if FOX what happens when you call the number associated with this line?

Chris

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