E1/T1 RJ45 (RJ48) back-to-back with 2MFT-TE1

E1/T1 RJ45 (RJ48) back-to-back with 2MFT-TE1

Cabling T1/E1 crossover for back-to-back connection

So proposition is to have a Multiflex Trunk card (1 or 2MFT).

Set it up on the router

card type t1 0 2  

or
card type e1 0 2

And connect both cards with T1/E1 crossover cable

Than configure the controller T1 or E1 -- one has to be DCE (clock source internal independent) and the other one DTE (clock source line)
(depends on HWIC slot - mine is in Slot 2)

Router1

controller T1 0/2/0

cablelength long 0db

framing esf
clock source internal independent
linecode b8zs
channel-group 0 timeslots 1-24 speed 64

Router2

controller T1 0/2/0

cablelength long 0db

framing esf
clock source line
linecode b8zs
channel-group 0 timeslots 1-24 speed 64

This will create a logical Serial interfaces on both routers (0/2/0:0).

Configure them an IP address (point-to-point /30 .252 subnet)

Verify with CDP and ping commands.

Running over T1 / E1 now! :)