Appendix E Configuration Menus IPmux-1/1E Installation and Operation Manual
E-18 IPmux-1 E1/T1 Configuration
Table E-12. E1 Physical Layer Configuration Parameters (Cont.) Parameter Possible Values Remarks
Loopback State Internal
External
Disable
Data received from the IP network side will be looped back to
the network transmit line. An unframed all ‘1’ code (AIS) will
be transmitted in the E1 Tx path toward the PBX. Incoming
data from the PBX will be ignored.
Data received from the PBX at the receive E1 line will be
looped back to the E1 Tx path (toward the same PBX), and will
continue its way to the IP network. Data coming from the IP
network will be ignored.
No loopback; regular operation
Default: Disable
Rx Sensitivity -10 dB, -32 dB Maximum attenuation of the receive signal that can be
compensated for by the interface receive path
Default: -10 dB
Line Type
Unframed
CRC4 Enable
CRC4 Disable
Framing mode and operation mode for each configuration
Framer will be configured to pass through mode and the
operation mode will be set to Transparent (see Chapter 1)
Framer will be configured to CRC4 MF mode. Operation
mode will be set by Signaling Mode field #6 to either
Fractional or Fractional with CAS (see Chapter 1).
CRC4 MF mode is disabled. Operation mode will be set by
Signaling Mode field #6 to either Fractional or Fractional with
CAS (see Chapter 1).
Note: Changing the Line Type setting disables the Line.
Default: CRC4 enabled
Idle Code 00 to FF Determines the idle code inserted into unused timeslots by
IPmux-1 at the transmit path towards E1 equipment.
Note: This field will not appear if “unframed” is selected in the
Line Type field.
Default: 7E