Specifications

Installation and Operation Manual Chapter 6 Troubleshooting and Diagnostics
IPmux-8/16 Ver. 6.00 Monitoring IPmux-8/16 Performance 6-11
Table 6-4. E3/T3 Statistic Parameters
Alarm Description
LOS The LOS defect is declared upon observing 175 +/- 75 contiguous pulse positions with no pulses of either
positive or negative polarity. The LOS defect is terminated upon observing an average pulse density of at least
33% over a period of 175 +/- 75 contiguous pulse positions starting with the receipt of a pulse.
AIS The AIS is framed with "stuck stuffing." This implies that it has a valid M-subframe alignments bits, M-frame
alignment bits, and P bits. The information bits are set to a 1010 sequence, starting with a one (1) after each
M-subframe alignment bit, M-frame alignment bit, X bit, P bit, and C bit. The C bits are all set to zero giving
what is called "stuck stuffing." The X bits are set to one. The E3/T3 AIS defect is declared after E3/T3 AIS is
present in contiguous M-frames for a time equal to or greater than T, where 0.2 ms ≤ T ≤ 100 ms.
The E3/T3 AIS defect is terminated after AIS is absent in contiguous M-frames for a time equal to or greater
than T.
The E3/T3 binary content of the AIS is nominally a continuous stream of ones.
When receiving AIS, the SYNC LED turns off.
ES Number of Errored Seconds in the current interval.
Any second containing the following error events:
• Line Errored Seconds (LES)
• P-bit Errored Seconds (PES)
• C-bit Errored Seconds (CES).
SES Number of Line Severely Errored Seconds in the current interval.
A Any second containing the following errored events is counted as severely errored seconds:
• P-bit Severely Errored Seconds (PSES)
• C-bit Severely Errored Seconds (CSES)
• Severely Errored Framing Seconds (SEFS).
UAS Number of Unavailable Seconds in the current interval.
The line becomes unavailable if 10 consecutive SESs appear. The 10 SESs are included in the UAS time. The
link becomes available if 10 consecutive seconds pass with no SESs. The 10 seconds with no SESs are
excluded from the UAS.
Displaying Channelized T3 Statistics
Channelized T3 statistics refer to the physical status of the CT3 traffic reaching the
IPmux from the adjacent device.
Path: > Performance Monitoring > Physical Port Statistics > Slot # 3/4.

To view the channelized T3 statistics:
1. From the Main menu, select Performance Monitoring.
2. From the Performance Monitoring menu, select Physical Port Statistics.
3. From the Physical Layer Statistics menu, select Slot # 3 or Slot # 4.
Physical Port Statistics screen for channelized T3 port is displayed
(see
Figure 6-5). Table 6-5 explains the channelized T3 statistic parameters
provided by IPmux-8/16.