AT&T 7500 series, 7100 series, 2500 series manual MS/T Configurations, Main-Satellite Configuration

4-2MAIN-SATELLITE/TRIBUTARY (MS/T) NETWORKS THROUGH THE UDP OR MULTIPREMISES PACKAGES

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MS/T CONFIGURATIONS

There are two types of MS/T configurations: main-satellite and main-tributary.

Main-Satellite Configuration

For a main-satellite configuration (see figure 4-1),attendant positions and public network trunks are typically concentrated at the main switch. Unattended locations are referred to as satellites.

Station/terminal users at the main and satellite may dial each other without the intervening dial tone that accompanies tandem tie trunk network dialing (see chapter 3). To a caller, the main and the satellite switches appear to be a single switch with one LDN. That is:

∙All incoming calls to a satellite are switched through the main over tie trunks.

∙Outgoing calls from the satellite location use the same tie trunks to access trunks and other facilities at the main.

This configuration uses 3-, 4-, or 5-digit dialing between the main and satellite switches.

Main-satellite configurations offer the following features:

∙A single LDN

∙Shared dialing plans between main and satellite stations/terminals

∙Public network calling (Direct Inward Dialing [DID]) to satellite stations/terminals through the main switch

∙Private network calling (Network Inward Dialing [NID]) to the satellite stations/terminals through the main switch.