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7-26
ADMINISTRATION OPTIONS AND REQUIREMENT’S — SYSTEM 85
For an ISDN trunk group, a dynamic trunk type (120) can be assigned to the group.
This trunk type allows the group to process calls with a different trunk type on a call
by call basis. For example, one incoming call over the group may expect station
number digits (as does a MEGACOM call), while the next call over the group may
expect a network number (as does an SDN call).
This trunk type allows flexibility in processing calls as opposed to a fixed static trunk
type. Both an AAR/ARS prefix digit (procedure 103) and a DID additional digit
(procedure 101) can be administered for ISDN dynamic trunk groups. (This cannot
be done for any other type of trunk group.) The dynamic trunk type may be used
for CBC service although any of the conventional trunk types could also be used if
incoming digits have been provisioned consistently. For example, trunk type 41
could be used as a CBC trunk group to support MEGACOM, MEGACOM 800,
and SDN if the incoming digits (for both MEGACOM 800 and SDN) reflect
extension numbers or seven digit RNX-XXXX numbers. Customers can choose
between 0 and 7 incoming digits to a switch.
Field 7
0
1
Field 8
Field 9
Assigns the dial access code restriction. Field encodes and their descriptions are:
Allows access to the trunk group via a dial access code.
Restricts and only allows access to the trunk group for trunk testing and for
providing unattended console service.
Assigns the trunk group as a MFT CO line appearance. For the ISDN application,
encode
(0)
is applied.
Displays default signaling and verify that the type of trunk signaling is correct. The
ISDN feature uses message-oriented signaling. Therefore, encode 20 should be
used. If the trunk signaling is not as desired — then it may be changed with field 2
of word 3.
Procedure 100 Word 2: Trunk Group Data Translations
This word is used to administer data characteristics for each trunk group. The ISDN feature does not
place any new or additional requirements or restriction on the use of this procedure. Selecting the
appropriate translations requires the same basic considerations as previously. Therefore, a description
for this procedure’s fields is not provided. Figure 7-11, Procedure 100 Word 2: Trunk Group Data
Characteristics (System 85 R2V4), depicts procedure 100, word 2.