ADTRAN TSU 120 User Manual page 82

Chapter 5. Configuration Menu
Menu Items
LINE LENGTH (FT)
IN-BAND
LOOPBACK
(INBAND LPBACK)
ROBBED BIT
SIGNALING
(ROB BIT SIGNL)
5-24
provides selection of the proper
L L
INE ENGTH
output level for the base DSX-1 based on the length
of the interface cable.
Choices: 1-133 ft, 133-266 ft, 266-399 ft, 399-533 ft,
533-655 ft, -7dB
I - L
N BAND OOPBACK
reject in-band loopup or loopdown codes (per
ANSI T1.403 specification) which may be sent to
the card over the DSX-1 interface. This loopback is
a line loopback.
Choices: Accept, Reject
This menu option is used to enable/disable
robbed-bit signaling. Whenever the base DSX-1
interface is connected to terminal equipment (i.e.,
PBX/SW56) for voice or dialed data services, this
option should be enabled. The only exception is
when the terminal equipment is using a form of
common channel signaling (i.e., PRI). For
applications requiring robbed-bit signalling as well
as a messaging channel (i.e., some proprietary PBX
channels), the
ON:DSOs 1-23
Choices: OFF, ON: ALL DSOs, ON: DSOs 1-23
TSU 120 User Manual
Description
sets the base DSX-1 to accept or
selection is provided.
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