Isdn Administration; International (Unrestricted) Calls; System Related Parameters - Avaya 6424D+M User Manual

DEFINITY Communications System
DEFINITY High Speed Link
User´s Guide
Appendix D: Applications and Switch Administration

ISDN Administration

If this application is implemented using ISDN PRI access facilities,
additional administration must be done. One of the parameters
that must be entered is the Bearer Capability Class (BCC) which
defines the nature of a call (for example, 56 Kbps data). When
administering an ISDN PRI facility, a new field will appear called
the BCC and for this application, that field should be populated
with a 1 to indicate 56 Kbps data transmission. Similarly, on the
Routing Pattern form (Screen D-4), a Y should be entered under
BCC Value, columns 0 and 1, to allow the switch to properly
handle the call.

International (Unrestricted) Calls

A 64 Kbps international call must be classified as unrestricted. To
do this on the DEFINITY Generic 1, the destination must be
recognized as an international number (typically with a 011
prefix). Note that the Generic 1 can only set up a call as
unrestricted if the call is an international 64 Kbps data call and
routed over ISDN PRI facilities.
The Generic 3 has the added capability to set up a domestic or
international call as unrestricted. This is done by adding the
Information Transfer Capability (ITC) and Bearer Capability
Information Element (BCIE) fields to several administration
forms. Depending on how these fields are administered, the
switch can decide if the call is to be routed over restricted or
unrestricted facilities. The default settings for these fields is for
restricted (domestic) calls. However, if both restricted and
unrestricted (international) endpoints are to be called, the routing
patterns must be changed. Specifically, a routing pattern should
be created so that the trunk group to Switched Digital
International accepts a restricted endpoint and sets up the call as
unrestricted. This is accomplished by setting the ITC field to both
(unrestricted and restricted) and the BCIE field to unr
(unrestricted) in the Routing Pattern forms (these fields only
appear on systems administered with ISDN PRI).

System Related Parameters

Data calls that traverse through international networks or over
multiple tandem switches may experience long call set-up
intervals. This may cause the switch to drop the call before the
call can be completed. To remedy this situation, the "Off-Premises
Tone Detect Timeout Interval" can be increased to a maximum of
25 seconds. This field can be found on the "Feature Related
Systems Parameters" screen.
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