4-20 Cisco IGX 8400 Series Reference
Universal Switching Module Enhanced
T1 HCS masking (on or off)
Payload scramble (on or off)
Loop clock (enable/disable)
Line framing (ESF or D4)
Cable length (0 to 655 feet, ABAM cable only)
Idle code
Line coding (fixed as B8ZS)
E1 HCS masking (on or off)
Payload scramble (on or off)
Line DS0 map (timeslots 0 to 31 for unframed or 1 to 15 and 17 to 31 for framed
format)
Loop clock
Idle code
Line coding (fixed as HDB3)
Receive line impedance (BNC fixed at 75 ohms; DB-15 fixed at 120 ohms)