A customer recently purchased the PA-MC-8TE1+ module for their 7500 Router at their head office. They would like for the T1 module to connect to their remote offices that have Paradyne CSU/DSU's which connect to a 2801 Cisco Router via V.35 cable to a serial port. Before testing this via the actual T1 link, we decided to test the equipment first via a T1 crossover cable (back-to-back) just to make sure that everything is working correctly.
I configured both the Cisco T1 module and the Paradyne CSU & DSU to use B8ZS linecoding and ESF framing. And since this is a back to back connection, I configured the Cisco router to run the internal clocking. I then configured the IP Address's on both routers within the same subnet and used Encapsulation PPP, yet despite my best efforts, I only get Line Up and Protocol Down.
When checking the Paradyne equipment, they indicate that the connection is established without any problems.
The actual Part Numbers for the Paradyne CSU/DSU are 7974 TDM SDSL and 7975 TDM SDSL.
I know this is a stupid question, but does Cisco integrate with non-Cisco CSU/DSU's? I would appreciate any help and working configuration samples with similar non-cisco products.