User manual

Chapter 5. Configuration Menu
61202156L1-1 TDU 120e User Manual 5-21
Inband Loopback (INBANK LPBACK)
In-band Loopback sets the base DS-1 to accept or reject in-
band loop-up or loopdown codes (per ANSI T1.403 specifica-
tion) which may be sent to the card over the DS-1 interface.
This loopback is a line loopback.
Choices: Accept, Reject
Robbed Bit Signaling
This menu option is used to enable/disable robbed-bit
signaling.
Whenever the base DS-1 interface is connected to terminal
equipment (for example, PBX/SW56) for voice or dialed data
services, this option should be enabled.
Exception: When the terminal equipment is using a form of
common channel signaling (for example, PRI).
For applications requiring robbed-bit signalling as well as a
messaging channel (such as some proprietary PBX channels),
the ON: ENA BLOCK selection is provided.
Choices: OFF, ON: ALL DSOs, ON: ENA Block
RBS Start
When Robbed Bit Signaling option is set to ON: ENA B
LOCK
,
this item defines the first DS0 to extract signaling from.
RBS End
When the Robbed Bit Signaling option is set to ON: ENA
Block, this item defines the last DS0 to extract signaling from.
Example: RBS Start and RBS End together define a block of
DS0s for Robbed Bit Signaling.