A-22
DBS 576HD (USA) issued September 2001
576HD-50-700
Section 700 - Operation
Figure A-5. Example Foreign Exchange Lines From City A to City B
In this case we have two Foreign Exchange (FX) lines to a City B Central Office Exchange. Using these lines are like dialing directly
from the City B exchange. We pay a flat fee for the FX line. There is no additional charge for calls to City B.
For this example, there are three office exchange numbers in City B (555, 556, and 557) that we want to be able to call that are local
calls. There are no other exchanges that begin with 55X.
Implementation
The configuration of this system is described in the following steps:
1. The system needs are listed in Table 7, “Example - User Needs Worksheet,” on page 23.
Most of the information is straight forward. The Day TRS and Night TRS Classes are determined by
assigning consecutive Class numbers to each unique calling need. When a duplicate need is encountered,
the same class number is assigned.
The system trunk equipment is listed in Table 8, “Example - MCO Tenant/Trunk Groups Worksheet,” on
page 24.
City B
City A
FX
