Testing A Loopback Jack Without A Smart Jack - Avaya G450 Installing And Upgrading

Power supplies and adjunct systems

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 two 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 151 and
Figure 151: Network interface at "dumb" block for an MM710 multi-media module
Figure notes:
1. Span section 1
2. Span section 2
3. G450 Media Gateway
4. E1/T1 port on an MM710
multi-media module
274 Installation and Upgrades for the Avaya G450 Media Gateway
Figure 152.
MDM USB ETH WAN
CONSOLE SERVICES ETR CCA ETH LAN
ALM COMPACT FLASH
CPU
PWR
1 2 3 4 5 6
1 2 CARD IN USE
V10
V1 V5
V2 V6
V3 V7
V4 V8
G450
RST ASB
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