AT&T DS1/DMi/ISDN-PRI manual 62ADMINISTRATION Options and Requirements Generic

7-62ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2

Field 14 Field encodes and their descriptions are:

0 Assigns that the DS1/DMI-BOS channels can be used for both trunks and lines

(MIXED); the latter is frequently referred to as off-premises stations (OPS).

1 Assigns that the interface is used to provide DMI-BOS trunks. The DMI-BOS trunk groups are defined using procedure 100, word 1 (encode 108 and/or 109).

The DMI-BOS application uses the switch’s DS1 to provide a high-speed multiplexed data interface for connecting to compatible computers. The computers may be located on the same customer premises as the switch or many miles away. The DS1/T1-carrier facilities are used between the switch and remote computers.

The DMI-BOS application provides 23 data channels plus 1 signaling channel. Each data channel can be considered a 64K-bps clear-channel. However, the permissible data rates are dependent on the trunk group translations that are selected in procedure 100, word 2.

24th-channel signaling is the only required service/facility option. All others (framing format and line coding format) are DMI application independent. However, the distant computer and all intermediate T1 transmission equipment must be compatible; refer to the caution regarding B8ZS line format and data communication protocols.

The ACCUNET switched digital service can be provided by setting up a trunk group with encode 109. However, a DS1 must be optioned for RBS (procedure 260 field 8). The only other administration requirement is that the trunk groups translation (field 3 of procedure 100, word 2) be enabled for 56K-bps encode one.

The trunk group used to provide ACCUNET switched digital service may contain as few as 1 or as many as 24 members. Therefore, the same DS1 may also be used to provide CO, FX, WATS, DID, and Remote Access trunks.

2Assigns that the DS1 provides 24 lines. These are generally called off-premises stations (OPS).

When a DS1 facility is used exclusively for lines, it must be administered for RBS. Also, the facility cannot be used as a synchronization reference.

When a DS1 is administered for lines (OPS), it provides 24 channels that terminate in a remote D4-channel bank, CDM, or their equivalent.

Analog equipment location assignments are administered by procedure 000, word 1, with field 8 translated a 2. The DS1/OPS channels are translated to equipment locations (individual extensions) with procedure 000, word 1, with field 8 translated (9), rather than with procedure 116 that was used for trunks.

5Assigns that the DS1 is used to provide DMI-MOS or ISDN-PRI trunk facilities.

NOTE: When encode 5 is administered, procedure 262 is automatically translated with standard default options. These default options should be checked (later) for consistency with the distant end; refer to procedure 262, word 1.