User manual

Appendix C. System Messages
C-4 TDU 120e User Manual 61202156L1-1
Table C-5. Nx/DBU Interface Status Messages
Name Description
Loop Up Data is looped at both the network interface and
DTE interface of the card
Remote Loop Up Sending V.54 pattern in an attempt to loop up a re-
mote device
511 Pattern On Sending 511 pattern towards the network inter-
face
Loop Down Data is no longer looped back at the network inter-
face or DTE interface
511 Pattern Off No longer sending 511 pattern towards the net-
work interface
Table C-6. DS-1 (PBX) Interface Status Messages
Name Description
Frame Slip Indicates a Frame Slip has occurred on the DS-1 in-
terface. This is present in Alarm History only
Line Loop Up Line loopback activated
Port Loop Up Port loopback activated
Loopdown Loopback has been deactivated