AT&T DS1/DMi/ISDN-PRI manual Services/Network Features, for the appropriate encode

7-102ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2

Fields 1-3	The ISDN-PRI does not place any new or additional considerations on translating
	these fields. The codes and digits translated are generally dependent on each ARS
	plan and other switch and network considerations.
Field 4	Translates the ISDN trunk type. The network SERVICE application, and any
	associated application requirements, will determine the appropriate trunk type.
	Furthermore, trunk type selection should be coordinated with previous assignments
	from procedure 100, word 1. Table 7-11,Network Services/Network Features, lists
	the current AT&T network services/network features and (for most applications) the
	recommended trunk type.
Field 5	Specifies the network service that is requested. Refer to table 7-11,Network
	Services/Network Features, for the appropriate encode.
Field 6	Assigns a BCCOS to the preference. Permitted numbers include any previously
	defined BCCOS from procedure 014, word 1.

Procedure 321 Word 1: AAR Tables (Generic 2)

This procedure is used for translating/controlling the Automatic Alternate Routing feature. Figure 7-51,Procedure 321 Word 1: Automatic Alternate Routing Route Tables (Generic 2), depicts this procedure.