Patton electronics Access Server, Administrator'S Reference Manual

Page: 222 / 262

22 • T1/E1 Link Access Server Administrators’ Reference Guide
222 Line Status (dsx1LineStatus)
• dsx1E1-MF—Based on CCITT/ITU G.704 with TS16 multiframing, without CRC
• dsx1E1-CRC-MF—Based on CCITT/ITU G.704 with TS16 multiframing, with CRC
Circuit ID (dsx1CircuitIdentifier)
This is the transmission vendor’s circuit identifier. Knowing the circuit ID can be helpful during
troubleshooting.
Line Status (dsx1LineStatus)
This variable indicates interface line status. It contains loopback, failure, received alarm and transmitted alarm
information. If any condition other than
No Alarms
exists, you can click on the
Alarms Present
link to view the
Line Status Alarms window (see figure 72).
Figure 72. Line Status Alarms window
The alarms currently present on the line will be indicated by the
ACTIVE
label next to the alarm type.
Failure States
The following failure states are reported in the dsx1LineStatus object. The items listed in this section comprise
those contained in RFC 1406—Definitions of Managed Objects for the DS1 and E1 Interface Types.
Far End Alarm Failure
Far End Alarm failure is also known as a Yellow Alarm in the T1 case or Distant Alarm in the E1 case.
For D4 links, the Far End Alarm failure occurs when bit 6 of all channels has been zero for at least 335 ms. The
alarm is cleared when bit 6 of at least one channel is non-zero for a period T, where T is usually less than 1 sec-
ond and always less than 5 seconds. The Far End Alarm failure is not declared for D4 links when a Loss of Sig-
nal is detected.