I have problems with a new installation. CM 4.1 and mgcp controlled 2821 router with one e1 and 8fxs ports.
faxes on FXS port on the router fail. 1 page fax usually goes through, but any more than that and it will almost certainly fail half way through the page.
The router is running ver12.4(13)a IOS
I have reduced speed on fax to 14.4bps and turned off ECM but still doesn't work.I have read all the docs regarding mgcp setup for fax passthrough but cant see why this is failing. Anyone have any ideas, i attach my config and debug.
Can you check that you have set up network clocking for the router as this is what usually causes the poroblem of only one fax page being processed properly.
This should show where the router is being clocked from, if you havent configured the clock at all you will be showing an internal router clock . Ideally you want to be clocking from the E1 link if it is connected to a ISDN/PSTN service provider. This peice of config is from a 3845 but it will be similar for you.
network-clock-participate wic 0
network-clock-select 1 E1 0/0
This sets the clock preference (1) to be the ISDN line
hope this helps