AT&T 2500 series Manual De Usuario

MAIN-SATELLITE/TRIBUTARY (MS/T) NETWORKS THROUGH THE UDP OR MULTIPREMISES PACKAGES

4-3

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CENTRAL

OFFICE

LDN

TRIBUTARY

EXTENSIONS

3600-3699

TRUNK

TIE

NETWORK INWARD

DIALING (NID)

RNX (542-XXXX)

MAIN PBX

EXTENSIONS

2800-2899

3200-3299

SATELLITE

PBX (B)

EXTENSIONS

3400-3499

SATELLITE

PBX (A)

EXTENSIONS

3300-3399

3500-3599

ETN NETWORK

REMOTE ACCESS

TRUNK

TIE

CENTRAL

OFFICE

(725-XXXX)

(727-XXXX)

LDN/DID

Figure 4-2. MS/T Coordinated Numbering

A main-tributary configuration is one in which the subtending location is the tributary.  This configuration
is very similar to a main-satellite configuration with the following exceptions:

1.  The main has its own LDN and the tributary usually has its own LDN.  (See figure 4-2.)

2.  A tributary can have one or more attendant positions.

3.  A tributary usually has public network trunks.