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Primary Rate Interface (PRI) and T1 Feature

Description

Network Selection Table

The Network Selection table lists the prefixes for dial access to alternative long-distance carriers (for example, 10xxx). If multiple entries in the Network Selection Table match the dialed number, the one with the most non-wild card digits prevails. If the first digits of a dialed number (on PRI) match any entry in this table, the entry pattern is deleted from the dialed number and the number represented by the asterisks is used as the network selected. Characteristics and valid entries for the Network Selection table are as follows:

• There can be up to four entries (0 through 3).
  
  
• The pattern can be up to eight digits.
  
  
• An asterisk (*) is a wild card.
  
  
• The pattern cannot begin with an asterisk but must contain at least one.
  
  
• All asterisks must be at the end of the pattern and contiguous.

The Special Services Selection table lists prefixes that represent special services, such as operator service or international dialing (0 or 00). If multiple entries in the Special Services Selection table match the dialed number, the one with the most digits prevails. Characteristics and valid entries are as follows:

• There can be up to eight entries (0 through 7).
  
  
• The pattern can be up to four digits (no wild cards).
  
  
• The choices for Operator are: Operator (OP), Presubscribed Common Carrier Operator (OP/P), and None.
  
  
• The choices for Type of Number are National (N) and International (I).
  
  
• The number of digits to delete can be from 0 to 4.

Topics
	Description
	Called Party Nunber (CdPN) Calling Party Number (CPN) Lines / Trunks PRI T1 DS1 Facility Options Type of Service Framing Format Line Coding Channel Service Unit   Line Compensation Signaling Mode Tandem PRI Trunks Tandem PRI Trunk Programming PRI Programnming Options PRI Programnming Options - PRI Telephone Number PRI Programnming Options - Network Services Supported PRI Programnming Options - Copy Telephone Number to Send PRI Programnming Options - Telephone Number to Send PRI Programnming Options - Test Telephone Number   PRI Programnming Options - Timers and Counters PRI Programnming Options - Terminal Equipment Identifier (TEI) PRI Call Processing Incoming Calls Outgoing Calls Network Selection Table Call-by-Call Services Table Station Identification - Automatic Number Identification T1 Programming Options T1 Programming Options - T1 Tie Trunk Connections T1 Programming Options - T1 Routing by Dial Plan System-wide Programming Options - Clock Synchronization System-wide Programming Options - Clock Switching
	At a Glance
	Considerations & Constraints
	Incoming Calls Outgoing Calls
	System Programming
	Mode Differences
	Feature Interactions