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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
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.