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Issue 6
5 - 46
SW2 Position 2 LED Channel Busy Indications are as
follows:
LED 1
¥
LED 2
¥
LED 3
¥
LED 4
¥
LED 5
¥
LED 6
¥
LED 7
¥
LED 8
¥
LED 9
¥
LED 10
¥
LED 11
¥
LED 12
¥
4.8.5
Alarm Conditions
A brief description of each alarm condition referred to
under the SW2, position 0 alarm indications is given
below.
Layer 1 Status
¥
LED Lights red when layer 1 is active. The LED is
off when layer 1 is inactive.
Controlled Slip indication (SLIP)
¥
When the difference between the timing of a
synchronous receiving terminal and the received
signal
synchronous terminal, the LED lights red.
Remote Alarm Indication (RAI) Detection
¥
When RAI is received the LED lights red.
Loss of Frame (LOF) Condition Detection
¥
When two of the four or five framing data bits
received are in error, the LED lights red.
Alarm Indication Signal (AIS) Detection
¥
When the system is receiving an Alarm Indication
Signal from a PRT trunk, the LED lights red.
Channel 13
Channel 14
Channel 15
Channel 16
Channel 17
Channel 18
Channel 19
Channel 20
Channel 21
Channel 22
Channel 23
Not Used
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Installing Electronic Telephone Units
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