DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-685DS1 CONV-BD
9
This test is executed by the TN574 DS1 Converter circuit pack only. Test #790
covers this testing for the TN1654 DS1 Converter.
This test starts at the DS1 CONV circuit pack whose equipment location was
entered and loops at the Fiber Optic Terminator (lightwave transceiver) that is
connected to the DS1 CONV circuit pack at the other end of the DS1 CONV
Complex. See diagram below.
Every part of this test is executed under firmware control and the result is sent
back to the maintenance software. Test is executed by sending digital data
through every DS1 facility channel. Two different test patterns are used, these are
hexadecimal values 55 and AA.
On a Standard and High Reliability System (no PNC duplication), this test can
only be executed at the end-point which is closer to the SPE relative to the
neighbor DS1 CONV circuit pack because of its impacts on the system control
links, also the completion of the test will be delayed in this configuration to wait
for the recovery of the system control links. On a Critical Reliability System (PNC
Duplication), test can be executed at any DS1 CONV circuit pack.
Figure 9-36. Far-end Lightwave Transceiver Loopback Test
lightwave
transceiver
SNI
B
DS1CONVDS1CONV
A
EI Network
Loo
s here
Metallic or Fiber Connection
