MGCP with Asterisk

HI, I once opened a thread about Asterisk running as a MGCP-Call Agent.

Now i set up a system using an cisco 1760 media gateway and asterisk as its CA. Making calls from the gateway to other users is no problem. But im not able to create a connection to one of the gateways endpoints.

When I try to make such a call Asterisk always sends the following CRCX - Command to the gateway:

As you can see the connection mode is “recvonly”.

The next Command is a RQNT including the Caller-Identification and the ringtone. The gateway here uses the response-code 400 (endpoint is in a transient stat) and the connection gets deleted.

So everything works fine until the CRCX-Command is sent. I think that the connection mode should be “sendrecv”.

Does anyone have an idea how to configure Asterisk changing the connection mode? Or are there other possibilities why this error occurs?

Thank you, stewdi