Avaya G700, Installing And Upgrading

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DS1/T1 CPE loopback jack
Issue 10.2 May 2007 387
Testing a loopback jack without a smart jack
When the loopback jack is added to a span that does not contain a smart jack, the span is
divided into 2 sections: from the MM710 to the loopback jack and from the loopback jack to the
central office (CO). Section 2 includes the short cable from the loopback jack to the dumb block
demarcation point (part of the loopback jack). This cable is the only part of Section 2 that is part
of customer premises wiring. It is not covered in the loopback jack’s loopback path. See
Figure 40 and Figure 41 .
Figure 40: Network interface at “dumb” block for an MM710 multi-media module
Figure notes:
1. Span section 1
2. Span section 2
3. G700 or G350 Media Gateway
4. E1/T1 port on an MM710
multi-media module
5. RJ-48 to network interface (up to 1000 ft. [305 m])
6. Loopback jack
7. Dumb block (demarcation point)
8. Interface termination or fiber multiplexer (MUX)
9. Central office
prdfcs8c LAO 092006
ALM
TST
ACT
1 2 3 4 5 6 8 7
ALM
TST
ACT
1 2 3 4 5 6 8 7
E1/T1 EIA 530A DCE
ALM
TST
ACT
SIG EI SO EM SM EO SI
1 2
3
4
5
6
7 8 9
ALM
APP
ACT
OK TO
REMOVE
S8300C
C_V1
SHUT DOWN
SERVICES USB 1 USB 2 USB 3