Specifications

3-33
Cisco AS5x00 Case Study for Basic IP Modem Services
11/24/1999
Section 3 Commissioning the Cisco AS5800 Hardware
Enabling the T3/T1 Controllers
From the reference point of the NAS, Table 3-7 provides a list of T1 alarm conditions and descriptions.
For more information about controllers, see the section “Channelized E1 & Channelized T1 Setup
Commands” at the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/dial_r/drprt1/index.htm
Step 5
Verify that the 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#
Additionally, enter the
show interface S1/0/0:4:23
command.
Table 3-7 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.
Loop Back 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.