AT&T DS1/DMi/ISDN-PRI manual Procedure 107 Word 1 System 85 R2V4 & Generic

C-8ADMINISTRATIVE PROCEDURE SUMMARY

Field 15 BC (System 85 R2V4 Only). For ISDN-PRI this field comes into play on interworked tandem calls through the switch where the calling trunk is non-ISDN-PRI and the called trunk is ISDN-PRI. Here, the BC of the non-ISDN trunk is used to define a BC that is used in the outgoing setup message over the ISDN-PRI trunk. See the B C section for encodings of the BC IE.

The BC is also used to determine which ARS/AAR route to select. This is discussed in the Procedure 309 Word 5 and Procedure 321 Word 5 sections later in this appendix.

PROCEDURE 107 WORD 1 (System 85 R2V4 & Generic 2)

This procedure is used to assign terminating test line telephone number digits to ISDN-PRI trunk groups. When placing a trunk verification by station (TVS) or trunk verification by customer (TVC) test call, these digits are used to build the called party number IE in the setup message for the trunk group under test. If digits are not translated for a trunk group and a TVC/TVS call is made for a channel in this trunk group, the resulting called party number IE will not contain address digits.

Called-Party Number IE (System 85 R2V4 & Generic 2)

The following rules are used in building this IE. These rules apply to all types of calls made out of the switch and not just test calls. The rules are checked by the system in the order shown below. The first true rule encountered results in the IE being built as shown for that rule.

For international calls (that is, a dial

011calls)

For ARS calls

Opcode: 7 (assuming no codeset mapping)

Numbering plan identification: telephony numbering plan

Type of address: international number (address digit octets follow)

Opcode: 7 (assuming no codeset mapping)

Numbering plan identification: telephony numbering plan

Type of address: national number (address digit octets follow)

For calls placed over a channel whose interface endpoint in procedure 116 specifies network

For AAR calls and calls placed over a channel whose interface endpoint in procedure 116 specifies either host or PBX

Opcode: 7 (assuming no codeset mapping)

Numbering plan identification: telephony numbering plan

Type of address: national number (address digit octets follow)

Opcode: 7 (assuming no codeset mapping)

Numbering plan identification: private numbering plan

Type of address: unknown (address digit octets follow)