COMMUNICATION SYSTEM NETWORKING — AN OVERVIEW

2-9

_______________________________________________________________________________________

_

 

 

 

 

 

 

9 + (NPA) + NNX + XXXX

 

 

 

 

OR

 

 

 

 

 

NETWORK

 

 

 

 

 

DAC + EXT

 

 

TO ARS

 

 

 

 

 

OR

 

 

 

 

 

NETWORK

 

 

∙ DAC + EXT

 

 

 

EXTENSION NO. STEERING

TO TRUNK

 

EXT

EXTENSION NO. PORTABILITY

NODE + EXT

TO AAR

 

 

 

 

 

 

 

UNIFORM DIAL PLAN FUNCTION

RNX + EXT

TO AAR

 

OR

 

 

 

 

 

 

 

 

 

NETWORK

 

 

 

 

 

 

LOCAL

 

 

 

 

 

STATION

INTERNAL

 

 

 

 

 

 

 

 

 

 

DIAL

 

 

 

 

 

PLAN

 

 

 

 

 

 

 

TO AAR

 

OR

8 + RNX + EXT

 

 

 

 

 

 

 

 

 

NETWORK

 

 

 

 

 

Figure 2-1.Internal Dial Plan Interactions

—Local station number dialing— When only an extension number is dialed, the internal dial plan first attempts to match the extension number with a terminal on the same switch. If no match is made and if MS/T or ETN networking software is active, the internal dial plan submits the call to the networking software for further analysis. When no networking software is active, however, the internal dial plan sends the call to intercept.

—Extension number steering — On a DIMENSION, System 85, or Generic 2 communications system, if the Multipremises package is activated, the dial plan uses the extension number it receives to find a dial access code. The system sends the call over the trunk group that the access code designates.

—Extension number portability — If extension number portability has been administered on the switch, the internal plan uses the extension number it receives to find the node number of the destination switch. It sends both the extension and node number to AAR for processing.

Extension number portability is an option that can be administered when the ETN (Standard Network) package has been activated on a System 85 (R2V3 and R2V4) or Generic 2 communications system.

—The Uniform Dial Plan (UDP) function — If the UDP function is available, the internal dial plan uses the extension number it receives to find the RNX of the destination switch. (The System 75 and Generic 1 use the PBX code embedded in the extension number to find the RNX.) It sends both

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AT&T 7200 series, 7500 series, 7100 series, 2500 series, 7400 series, 7300 series manual DAC + EXT To ARS
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