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DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects
3-509DIG-LINE (Digital Line)
3
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.
Table 3-214. System Technician-Demanded Tests: DIG-LINE
Order of Investigation
Short Test
Sequence
Long Test
Sequence D/ND
1
1. D = Destructive, ND = Non-destructive
Digital Terminal Remote Loop Around Test (#1201) X D
Voice and Control Channel Local Loop Around Test (#13) X ND
Digital Line NPE Crosstalk Test (#9) X ND
Digital Line Electronic Power Feed Test (#11) X ND
DIG-LINE Station Lamp Updates Test (#16) X X ND
Station (Digital) Audits Test (#17) X X ND
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