Redline Communications AN-30e, Руководство пользователя

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AN-30e
user manual
70-00035-01 Proprietary Redline Communications © 2004 November 16, 2004
Page 28 of 103
Interfacing from the RJ-48 TDM port to a CPE device (DSU/CSU or PBX) requires
the use of a cross over cable, constructed using 24 AWG Cat 5 wiring. These cable
connections are listed in the following table.
Table 11: TDM RJ-48 CPE Connection Cable
Connector A Connector B
1 4
2 5
4 1
5 2
TDM Alarm LEDs
Each serial interface port has Alarm and Sync indicator LEDs mounted on the RJ-48
socket. These LEDs indicate the following alarm conditions on the TDM circuits:
Table 12: TDM Port Alarm Condition LEDs
Single Alarm Conditions
Alarm Sync LED (Green) Alarm LED (Amber)
No Alarm On Off
LOS Off On
LFA Blink On
AIS Off Off
RAI On Flickering
Multiple Alarm Conditions
Multiple Alarm Conditions
Alarm Sync LED (Green) Alarm LED (Amber)
AIS + LFA Blink Off
AIS + RAI Off Flickering
RAI + LFA Flickering Flickering
Alarm conditions detected by the terminal are sent to the customer equipment using
the TDM signaling channels. Refer to the following examples of AN-30e system
behavior for additional information.
Example 1: Loss of Tx to a subscriber CPE
Loss of Tx to a subscriber CPE would result in RAI from the CPE to the
subscriber terminal. This signal is annunciated using the LEDs at the subscriber
terminal, and sent to the local terminal and the customer central office equipment.
Example 2: Loss of Rx from a subscriber CPE
Loss of Rx from a subscriber CPE would result in LOS being annunciated using
the LEDs at the subscriber terminal, and AIS being sent to the local terminal and
customer central office equipment. The RAI issued by the central office
equipment would be registered at each of the terminals and propagated all the way
back to the subscriber CPE.