Digital Terminal Remote Loop Around Test - Avaya DEFINITY Server CSI Maintenance Manual

Table 202. System Technician-Demanded Tests: DIG-LINE
Order of Investigation

Digital Terminal Remote Loop Around Test (#1201)

Voice and Control Channel Local Loop Around Test (#13)
Digital Line NPE Crosstalk Test (#9)
Digital Line Electronic Power Feed Test (#11)
DIG-LINE Station Lamp Updates Test (#16)
Station (Digital) Audits Test (#17)
1. D = Destructive, ND = Non-destructive
Digital Terminal Remote Loop Around Test
(#1201)
This test checks the integrity of the connection between the SPE and the attached
Digital Terminal and the ability of the terminal and the associated port to send and
receive data. This test is based, in principal, on procedure 622 used in system 85
to help isolate digital terminal problems.
A request is presented to the terminal to go into loop back mode. Then data is
sent to the terminal and when received back, checked for consistency. This test is
run as a part of the craft command "test long" procedure. It is not included in any
error recovery strategy and generates no Error Log entries or alarms. To begin the
test, Maintenance will ask Call Processing to make the associated end point and
port "Maintenance Busy". This test will succeed if the endpoint is "idle". If the
reserve request fails then the test will abort. If the request succeeds then the SPE
sends a message to loop around both information channels for the digital terminal.
First the primary information (voice, Information Channel 1 or I1) channel loop
back test is run. The test is performed by sending a digital count from the
Tone/Clock circuit pack on the primary information channel time slot and receiving
the same digital count with a general purpose tone detector.
If the primary information channel test is successful, the loop around test for the
secondary information (data, Information Channel 2 or I2) channel is then
performed. This test is the same as the primary information channel loop around
test and is performed only if a DTDM is administered, which is also the case for a
linked DA.
1032
Issue 5 October 2002
Short Test Long Test
Sequence Sequence
X
X
X
X
X X
X X
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1
D/ND
D
ND
ND
ND
ND
ND