I have a 2851 VoIP router (CME) with four E1 ports.
One port is configured as normal E1 PRI, and it is connected to PSTN.
I want to configure another E1 port as a CAS signalling E1.
I need to be able to convert (inside the router) the e1 PRI to e1 CAS signalling, and also forward calls that come in in the PRI port to go to the CAS port.
So, firstly, I need to configure a CAS port.
I found some examples, but there are a lot of variables, and I am not really sure which ones to use.