WAN Applications
4-6 Viewing WAN Interface Status
Circuit ID
Allows you to enter a character string speciÞed by the circuit vendor as a circuit
identiÞer. This is used for a reference during troubleshooting processes.
Loopback Mode
Displays the loopback conÞguration of the DS1 interface. Click on the associated
button to select No Loop, Payload, or Line Loop.
Xmt Clock Source
Displays the T1 Transmit Clock Source. Click on the associated button to select
Loop Timing, Local Timing, or Through Timing. The default setting is Loop
Timing, which indicates that the recovered receive clock is used as the transmit
clock; Local Timing indicates that an internal clock source is used. Through
Timing is not supported by the WAN BRIM at this time.
Line Status
Indicates the status of the T1 circuit. Green indicates that there are no alarms
present. Red indicates that data communications have been disrupted at the
monitored device, due to a loss of frame synchronization or a loss of signal which
has occurred for more than two to three seconds. A yellow condition indicates
that the far end equipment has experienced a red alarm condition, and
subsequently reported it to the near end.
Signal Mode
Displays the type of signaling that is in use on the T1 line. The possible signal
modes are None, robbedBit, or messageOriented. None indicates that no bits are
reserved for signaling on this channel. When T1 Robbed Bit Signaling is in use,
this Þeld will display robbedBit. When Common Channel Signaling is in use on
channel 24 of a T1, this Þeld will display messageOriented.
LineBuildOut
Displays the value of the Line Buildout setting. This setting controls the amount
of attenuation of the T1 signal. You can set this value via Local Management. The
possible settings are 0 db, -7.5db, and -15 db; the default is zero. Consult you local
telephone carrier, before you change this value.
!
CAUTION
If AMI is chosen, the line code selection on the individual interfaces should not be set to
None; for more information on setting the interface line coding refer to ConÞguring the
Fractional Table, page 4-8.