Configurations Using Fiber Multiplexers - Avaya G450 Installing And Upgrading

Power supplies and adjunct systems
The local DS1 interface's payload loopback, which the DS1 service provider at the CO
●
end activates and tests.
The far-end MM710's line loopback:
●
a. At the SAT type test ds1-loop location
b. Type test ds1-loop location end-loopback/span-test to terminate
Bit error counts are examined as described in
the loopback jack
are no problems in the wiring between the far-end CO and the far-end MM710. Coordinate
this test with the DS1 service provider.
Failure of any of these tests indicate a problem in Section 2. This could mean bad
loopback jack -to-"dumb" block cabling, but is more likely to indicate a problem somewhere
between the "dumb" block and the CO. This is the responsibility of the DS1 service
provider.
If the DS1 Span Test confirms that there are no problems in Section 1, the technician
should proceed as follows to avoid unnecessary dispatch:
a. Identify and contact the DS1 service provider.
b. Inform the DS1 provider that loopback tests of the CPE wiring to the "dumb" block
(section 1) showed no problems.
c. If the far-end MM710 line loopback test failed, inform the DS1 provider.
d. Request that the DS1 provider perform a loopback test of their portion of the Section 2
wiring by sending someone out to loop Section 2 back to the CO at the "dumb" block.
If this test fails, the problem is in the service provider's wiring.
If the test passes, the problem is in the cable between the loopback jack and the "dumb"
block. Replace the loopback jack.

Configurations using fiber multiplexers

Use the loopback jack when customer premises DS1 wiring connects to an on-site fiber
multiplexer (MUX) and allows wiring to the network interface point on the MUX to be remotely
tested. This requires that the MM710 CSU be set so it can be used on DS1 wiring to the MUX.
Fiber MUXs can take the place of Interface termination feeds as shown in
Figure 151. Test these spans using the same procedures as metallic spans.
276 Installation and Upgrades for the Avaya G450 Media Gateway
far-csu-loopback-test-begin to activate this test,
where location is the DS1 interface circuit pack corresponding to the loopback
jack.
this test,
where location is the DS1 interface circuit pack corresponding to the loopback
jack.
on page 265. This test only isolates problems to Section 2 wiring if there
Testing the DS1 span from the MM710 to
Figure 148 through