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ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 2
Field 14
Field encodes and their descriptions are:
0
1
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).
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.
2 Assigns 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.
5
Assigns 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.