IPmux-1/1E Installation and Operation Manual Appendix E Configuration Menus
IPmux-1 E1/T1 Configuration E-21
Table E-13. T1 Configuration Parameters (Cont.)
Parameter Possible Values Remarks
Loopback State Internal
External
Disable
Data received from the IP network side is looped back
to the network transmit line. An unframed all ‘1’ code
(AIS) is transmitted in the T1 Tx path toward the PBX.
Incoming data from the PBX is ignored.
Data received from the PBX at the receive T1 line is
looped back to the T1 Tx path (toward the same PBX),
and continues its way to the IP network. Data coming
from the IP network is ignored.
No loopback – Regular operation
Default: Disable
Line Type
T1-D4
T1-ESF
Unframed
Framing mode and operation mode for each
configuration:
Framer is configured to T1-D4 mode. Operation mode
is set by Signaling mode field #6 to either Fractional or
Fractional with CAS (see Chapter 1).
Framer will be configured to T1-ESF mode. Operation
mode will be set by signaling mode field #6 to either
Fractional or Fractional with CAS (see Chapter 1).
Framer will be configured to pass through mode and
the operation mode will be set to unframed (see
Chapter 1).
Default: T1-ESF
Line Code B7ZS, B8ZS, AMI Default: B8ZS
Line Mode DSU, CSU Default: DSU
Line Length / Tx
Gain
DSU: 0-133 ft, 134-266 ft,
267-399 ft, 400-533 ft,
534-655 ft
CSU: 0 dB, -7.5 dB,
-15 dB, -22.5 dB
Default: 0 to 133 ft
Default: 0 dB
Restore Time 1 second,
10 seconds
Selects the T1 red alarm recovery time
Default: 1 second
Idle Code 00 to FF Inserted into unused timeslots by IPmux-1 at the
transmit path towards T1 equipment
Note: This field will not appear if “unframed” is
selected in the Line Type field.
Default: 7E