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MGCP Gateway Change port from POTS to Loop Start

I have an existing MGCP gateway port that I need to change from POTS to Loop start, however I have not seen a setting in UCM that allows me to do this. When I try to delete the port, it ask if I want to delete this gateway and I'm scared that it will blow all my ports away. Does anyone know how to reset this port to the default so I can program loop start or updat the existing port?

Cisco Employee

Re: MGCP Gateway Change port from POTS to Loop Start

Yeah you need to delete the port from the gateway and re-add it to change it.  You will need to remove route pattern/route group dependencies in order to delete the port.  I recommend you use the Dependency Records to find out what RGs this port is assigned to so that you can add it back in.

If these are FXS ports, I'd actually recommend you keep it at POTS until CM 8.5, though, since LS is the default configuration for the port in IOS, and there is this bug on CM, which isn't fixed until 8.5:


MGCP FXS GroundStart and LoopStart need Prefix DN; remove Attendant DN