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430 Installing and Upgrading the Avaya G700 Media Gateway and Avaya S8300 Media Server
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 42
and Figure 43.
Figure 42: 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
prdfcs8a KLC 080602
ALM
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REMOVE
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OKTO
SHUTDOWN
SERVICES USB1 USB2
E1/T1 EIA 530A DCE
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EISO EMSM EOSI
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