AT&T 7100 series, 7500 series, 2500 series MS/T Coordinated Numbering, Main-Tributary Configuration

MAIN-SATELLITE/TRIBUTARY (MS/T) NETWORKS THROUGH THE UDP OR MULTIPREMISES PACKAGES 4-3

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CENTRAL OFFICE

LDN

(727-XXXX)

	ETN NETWORK
TRIBUTARY
EXTENSIONS
3600-3699		NETWORK INWARD
		DIALING (NID)
		RNX (542-XXXX)
TIE
TRUNK

CENTRAL OFFICE

LDN/DID (725-XXXX)

SATELLITE

PBX (A)

EXTENSIONS 3300-3399 3500-3599

MAIN PBX EXTENSIONS 2800-2899 3200-3299

TIE

TRUNK

SATELLITE

PBX (B)

EXTENSIONS 3400-3499

REMOTE ACCESS

Figure 4-2.MS/T Coordinated Numbering

Main-Tributary Configuration

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.