Hello, we are trying to get a Cisco UC560 T1/E1 to connect with a BT (British Telecomms) ISDN-30e circuit. We are using just 8 channels.
On the UC560 under the T1/E1 trunk we have the following options, those marked with asterisk are the current settings that do not seem to work. WE have tried all the Switch types but none work. An engineer confirmed this morning (with his telephone) that he can make calls from the cable that plugs into the UC so we know the interface with the UC is the issue.