View source for Cisco Back-to-Back T1 Interface Configuration

=Background Information=
{| {{table}}
| align="center" style="background:#f0f0f0;"|'''Step'''
| align="center" style="background:#f0f0f0;"|'''Instruction'''
| align="center" style="background:#f0f0f0;"|'''Command'''
| align="center" style="background:#f0f0f0;"|'''Example'''
|-
| 1||Set the card to T1 mode||card type t1 ''slot subslot''||card type t1 0 0
|-
| 2a||Set the clock source to internal (on each DCE port)||controller t1 ''slot/subslot/port''<br> clock source internal||controller t1 0/0/0<br> clock source internal
|-
| 2b||Set the clock source to line (on each DTE port)||controller t1 ''slot/subslot/port''<br> clock source line||controller t1 0/0/1<br> clock source line
|-
| 3||Set the channel group 0 to include all 24 T1 timeslots||controller t1 ''slot/subslot/port''<br> channel-group 0 timeslots 1-24||controller t1 0/0/0<br> channel-group 0 timeslots 1-24
|-
| 4||Set the port framing to esf||controller t1 ''slot/subslot/port''<br> framing esf||controller t1 0/0/0<br> framing esf
|-
| 5||Set the linecode to b8zs||controller t1 ''slot/subslot/port''<br> linecode b8zs||controller t1 0/0/0<br> linecode b8zs
|}
You should now have a Serial0/0/0:0 interface and/or Serial0/0/1:0 interface which you can assign an IP address to and use as with any normal serial interface, make sure to include the :0 on the end of the interface though.
=Sample Two Card Configuration=
DCE IS S/0/0/0 AND DTE IS S0/0/1

 card type t1 0 0
 controller t1 0/0/0
 clock source internal
 chan 0 time 1-24
 framing esf
 linecode b8zs
 controller t1 0/0/1
 clock source line
 chan 0 time 1-24
 framing esf
 linecode b8zs

DTE IS S0/0/0 AND DCE IS S0/0/1

 card type t1 0 0
 controller t1 0/0/0
 clock source line
 chan 0 time 1-24
 framing esf
 linecode b8zs
 controller t1 0/0/1
 clock source internal
 chan 0 time 1-24
 framing esf
 linecode b8zs

====4000 Series routers use slightly different hardware nomanclature====

DCE IS S/0/1/0 AND DTE IS S0/1/1

 card type t1 0 1
 controller t1 0/1/0
 clock source internal
 chan 0 time 1-24
 framing esf
 linecode b8zs
 controller t1 0/1/1
 clock source line
 chan 0 time 1-24
 framing esf
 linecode b8zs

DTE IS S0/1/0 AND DCE IS S0/1/1

 card type t1 0 1
 controller t1 0/1/0
 clock source line
 chan 0 time 1-24
 framing esf
 linecode b8zs
 controller t1 0/1/1
 clock source internal
 chan 0 time 1-24
 framing esf
 linecode b8zs