Complex Cases - Cisco NORTEL SL-100 Supplement Manual

priority, and an option exists to block any logon until the highest priority
application [or PIM] has logged on, and to force the logout of the lower
priority application [or PIM] when the highest priority application [or
PIM] logs out).
Once the DMS-100 Session is established, the PIM and the third-party
application may send DN Association messages. CCS keeps track of
which DNs have been associated so only new associations are sent to the
DMS-100.
At this point, CCS knows which DNs have been associated by the third-
party application and the PIM; and as monitor messages are sent by the
DMS-100, CCS forwards them to either or both, depending on which has
associated the DN for the message. CCS also keeps track of the InvokeIDs
for any control messages or queries sent by the third-party application or
the PIM, so that the response will be sent back to the right place.

2.10.2. Complex Cases

A few complexities of various kinds can be introduced to the simple case:
1. More than one X.25 Link can be configured to the ACD or to the
third-party application, and a single CompuCALL Session can span
those X.25 Links.
•
The DMS-100 allows multiple connections and logons for the
same Session over multiple X.25 Links, both for increased
bandwidth and redundancy purposes. The DMS-100 applies DN
Associations done by any of the connections to the Session as a
whole. Monitor messages are split across all of the connections by
call (all messages for the same call use the same connection), so if
there are two connections, each receives approximately half of all
the messages.
•
This introduces the concept of a link group. In the simple case (see
6.1), messages sent from the DMS-100 to CCS are forwarded on
one or both of the connections to the third-party application or the
DMS PIM. The three connections are related, in that they share the
same messages. These three connections are called a link group.
When multiple X.25 Links are configured to the DMS-100 for the
same Session, multiple link groups are created in CCS. (See
diagram below.) Each link group sees a different set of messages.
There is no fixed mapping at configuration time as to which Link
from the DMS-100 corresponds to which connection to the third-
party application or PIM, but the total number must match (or
must be greater than or equal to the desired number of active
links—the desired number of active links for a third-party
application is configurable in the CCS setup). For each X.25 Link
to the DMS-100, an X.25 Link must be configured to the third-
party application, and an EMT connection must be configured in
the DMS PIM. (Actually, multiple connections can be established
over a single high-speed X.25 Link from the third-party
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