Node-To-Main, Satellite, Or Tributary Connections - Avaya Communication Server 1000 Series Reference

Transmission performance
5. Generally, no more than three TIE Trunks should be connected in tandem. A limit

Node-to-main, satellite, or tributary connections

Restrictions on these TIE Trunks follow:
1. The node-to-main trunk is normally a land circuit that does not exceed 250 miles
2. Volume loss on a node-to-main TIE Trunk, if less than 250 miles, must not exceed
3. Loss on main-to-satellite and main-to-tributary trunks must not exceed 2 dB.
Note:
In some cases, the telco can provide only non-VNL trunks, which have a loss exceeding
these objectives. If the loss is significantly higher than VNL, the switchable pad must be in
the "pad-out" mode for connection to these trunks.
To minimize toll charges, ESN can route calls over private network facilities to PSTN trunks.
The PSTN has a designed loss that does not take into account the added loss of extending
the call over private network facilities.
ESN, like any other private network, provides lower quality connections than a call routed
directly to the PSTN. The amount of degradation must be kept small enough that the
connection is acceptable to most end users. This loss is restricted as follows:
1. Off-network long-distance connections must only be established from trunks
2. Off-network local connections can terminate at nodes and main PBXs. For nodes,
44 Electronic Switched Network Reference — Signaling and Transmission
suppressor-controlled trunks, thus meeting this requirement. Because the
intermediate echo suppressor cannot be disabled, planners cannot place a trunk
that is not controlled by echo suppressors between trunks that are controlled by
echo suppressors.
of four is imposed between echo suppressor-controlled trunks. Software is arranged
to disable echo suppressors when it tandems a call from an echo suppressor-
controlled trunk to another such trunk. This software does not disable echo
suppressors on other connections.
(400 km). If this is not the case, the main circuit switch is treated as a node for
transmission planning. The transmission planning of the node-to-main TIE Trunk is
considered part of node-to-node transmission planning.
2.5 dB.
terminating on nodes. The private network loss added to the PSTN loss is limited
to the following:
a. 4.1 dB for calls originating at node stations
b. 6.6 dB for calls originating at main stations
the loss is the same as above. For mains, the loss is limited to the following:
a. 6.6 dB for calls originating at node stations
Comments? infodev@avaya.com
August 2011