Cisco AS5800 Specifications download pdf (Page 72)

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Cisco AS5800 Operations, Administration, Maintenance, and Provisioning Guide

DOC-7810814=

Chapter 2 Commissioning

Task 3. Enabling the T3/T1 Controllers

From the reference point of the NAS, Table 2-7 provides a list of T1 alarm conditions and descriptions.

For more information about controllers, see the information on channelized E1 and channelized T1 setup

commands in Dial-In Port Setup, available online at

http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/dial_r/drprt1/index.htm

Step 6 Verify that individual serial D channels are created. B channels S1/0/0:4:0 through S1/0/0:4:22 are

rotary members (dialers) of the signaling D channel S1/0/0:4:23.

5800-NAS# show ip interface brief | inc :23

Serial1/0/0:4:23 unassigned YES NVRAM up up

5800-NAS#

Step 7 Additionally, enter the show interface S1/0/0:4:23 command to verify the serial interface.

Table 2-7 Alarm Conditions

Alarm Description

CRC Errors Occur only in ESF format when a CRC bit has an error.

Excessive CRC Error Indication (ECRCEI) Reported in ESF format when 32 of any 33 consecutive CRCs are in error.

Out of Frame (OOF) Occurs when the framing pattern for a T1 line has been lost, and data cannot

be extracted. This is a red alarm. In SF and ESF formats, OOF occurs when

any two of four consecutive frame-synchronization bits are in error.

Loss of Signal (LOS) Occurs when 175 consecutive 0s are detected in the MC. This is a red alarm.

The signal is recovered if the density of 1s reaches 12.5%. The recovery

happens when four 1s are received within a 32-bit period.

Remote Frame Alarm (RHEA) Indicates that an OOF framing pattern occurred at the remote end. This is a

yellow alarm.

Alarm Indication Signal (AIS) Indicates to the remote end a loss of the received signal. This is a blue alarm.

AIS occurs when a stream of 1s is received.

Loopback Indicates that a remotely initiated loopback (from the network) is in progress.

Errored Seconds Depending on the framing format, indicates OOF conditions, frame slip

conditions, or error events.

For SF, errored seconds reports the number of seconds the frame was in the

OOF or slip condition. For ESF, errored seconds reports error events in

seconds.

Bursty Errored Seconds Reports CRC error conditions in seconds (ESF format only).

Severely Errored Seconds Reports error events or frame slip conditions in seconds.

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Cisco AS5800 Specifications Page 72