Specifications

Appendix E Parameters and Screens IPmux-4 Installation and Operation Manual
E-16 E1/T1 Configuration Parameters
Table E-11. E1 Physical Layer Configuration Parameters
Key Parameter Possible Values Remarks
1 Channel Status
Disable
Enable
E1 stops gathering statistics data and reports
that the line is operating properly. This does
not affect the data flow.
Default value: Enable
Transmit Clock Source
Adaptive
Loopback
Internal
External
Adaptive clock regeneration
The E1 recovered receive clock is used as the
transmit clock.
A local clock source is used.
Clock is derived from Channel 4. When one of
the other ports (1, 2, 3) is configured to
external clock, its transmit clock is taken from
the receive clock of port number 4.
Default value: Adaptive
3 Loopback State Refer to Chapter 4 for detailed instructions on
loopback tests.
4 RX Sensitivity
–10 dB, –32 dB
Determines the maximum attenuation of the
receive signal that can be compensated for by
the interface receive path
Default value: E1: –10 dB
5 Channel Type
Unframed
CRC4 Enable
CRC4 Disable
Determines the framing mode and operation
mode for each configuration
Framer will be configured to pass through
mode and the operation mode will be set to
Unframed (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)
Default value: CRC4 enabled
Note: Changing the Channel Type setting will
delete all connections.
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