Section 700 - Operation
Figure A-12. Example Foreign Exchange Lines From Atlanta to Birmingham
In this case we have two Foreign Exchange (FX) lines to a Birmingham Central Office Exchange. Using these lines are like dialing
directly from the Birmingham exchange. We pay a flat fee for the FX line. There is no additional charge for calls to Birmingham.
For this example, there are three office exchange numbers in Birmingham, 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.
The configuration of this system is described in the following steps:
Bi r mi ngham
The system needs are listed in Table 7, "Example - User Needs Worksheet," on page 336.
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
DBS 576 (USA), issued January 1999
At l ant a
Appendix A. ARS and TRS Operation