Carrier Access Access Bank II SNMP - Manual (Page 123)

12-2 9/24/01
Note: These tests as well as additional test functions can be performed using the
MS Windows-based Remote Monitor software. For directions on performing Self
Test loopbacks and tone transmission, enabling network loopbacks, and activating
automatic Alarm Cut-Off (ACO) via the software, see the separate Remote Monitor
User’s Guide.
12.3 Self Test 1 and 2
Caution: Because Self Test is a service-disrupting procedure. Disconnect all
attached telephones prior to initiating Self Test.
12.3.1 Local Mode: OFF = No Test Tone, ON = Ringback Tone
In the Local mode, when the Self Test DIP switch 1 or 2 is set to ON and the Trunk Processing Busy/
Idle switch on each equipped FX voice card is set to Busy, the T1 output signal from T1 Span 1 or
Span 2 is disconnected from the network and looped back into the appropriate T1 receiver. See Figure
9-1. The specified T1 signal is checked internally for framing, line coding, and bipolar violations
(BPV) errors, which verifies proper operation of the Controller card. The T1 signal from the specified
span is isolated at the T1 line connection point through relay contacts to ensure that all T1 transmit
and receive circuits are tested.
The Controller then runs a card level test and injects an internally generated ringback dual tone (440
Hz +480 Hz) into all attached PCM codec channels on the T1 span specified. This allows you to ver-
ify operation of the voice channels at the punchdown block or RJ-11 Harmonica with a telephone
“buttinsky” set. For normal Access Bank II - SNMP operation, the Self Test switch must always be
left in the factory default OFF position.
The self test takes up to 16 seconds. The T1 Test 1 or 2 LED turns red during the self test sequence.
When the self test is complete, the LED should turn green. (If the Test LED remains red for longer
than 16 seconds, the unit has failed the self test.) For the self test to be valid, the Access Bank II -
SNMP must be equipped with the Controller card and at least one voice card.
To start Self Test 1 or 2 in the Local mode:
1. Locate the Self Test 1 or Self Test 2 switch on the 10-position T1 Span Setup DIP switch on
the Access Bank II - SNMP Control Panel, and set it to the Self Test position (ON).
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