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 te st ch ecks the in tegr ity of the c onnec tion betw een th e SPE and the
attached Digital Terminal and the abilit y of the terminal and the associated port to
send and receive d ata. This test is based, in princip al, on procedure 622 used in
system 85 to help isolate dig ital terminal problems.
A request is presented to the term inal to go into loop bac k mode. Then data is
sent to the terminal and when received back, chec ked for consistency. This test
is run as a part of the craft c ommand "test long" procedure. It is not inc luded in
any error recovery strategy and generates no Error Log entries or alarms. To
begin the test, Maintenance wi ll ask Call Processing to make the associated end
point and port “ Maintenance Busy”. This test will suc ceed if the endp oint is
"idle". If the reserve request fails then the test will abort. If the request suc ceeds
then the SPE sends a message to loop around both infor mation channels for the
digital terminal. First the primar y information (voice, Information Channel 1 or I1)
channel loop bac k test is run. The test is performed b y sending a dig ital count
from the Tone/Clock circuit pack on the p rimary information channel time slot an d
receiving the same dig ital count with a general p urpose tone detector.
If the primary information cha nnel test is successful, the loop around test for the
secondary information (d ata, Information Channel 2 or I2) channel is then
performed. This test is the same as the p rimary information channel loop around
test and is performed only if a DTDM is administered, which is also the c ase for a
linked DA.
Table 3-214. System Technician-Demanded Tests: DIG-LINE
Order of Investigation
Short Test
Sequence
Long Test
Sequence D/ND1
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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