key to get help. Then, within ADAMedit help, click the
Search button, type the keyword “keypanel”, and press
Enter. Finally, choose “Keypanel Setup” from the result-
ing list.
For each intercom port, the PL1 through PL4 keys on the
CDP-950 correspond to keys 12 through 15 in the CSedit
or ADAMedit key assignment table. Note: when a key is
activated, both the talk and listen assignment for that key
will activate.
12
Trunking System
12.1
General Description
Refer to Figures
through
The RTS Trunking System manages intercommunications
between separate intercom systems using intercom ports
that have been reserved and interconnected between the
intercom systems. Keypanels or other data devices can
then communicate with various destinations in other inter-
com systems via the reserved intercom ports. (This is dif-
ferent from bus expansion, in which the entire bus system
of two or more frames are interconnected to form one
larger intercom system.)
The RTS Trunking System consists of a special version of
the RTS Model FR9589 Master Control Unit and one or
more RTS Model ICP-97TMX Data Distribution Panels,
depending on the number of intercom systems to be
trunked. A backup Master Control Unit may also be
added to the system to prevent downtime in the event of a
failure of the main master control unit. When both main
and backup control units are used, an RTS Model SWP-
71-T Switchover Panel and additional ICP-97TMX Data
Distribution Panels are also required.
12.2
General Theory of Operation
In a trunking system, the audio lines (not data) of one or
more intercom ports are interconnected between two
separate intercom systems. The system administrator in
each intercom system then places restrictions on these
ports to prohibit them from being assigned to any keys.
This reserves the ports for exclusive use as trunking lines.
A special data link is also connected from each intercom
system to the trunking system for exchange of system
control signals. Once the interconnections are completed,
the trunking system is programmed, using CStrunk, to
recognize the individual intercom systems.
After the trunking system has been programmed, system
administrators or keypanel users in each intercom system
may request lists of persons, party lines etc. from the
other intercom systems for purposes of key assignment
just as they would in their own intercom system. After
keys are assigned, keypanel operators can activate them to
talk or listen just like in their own intercom system. There
is no apparent difference to keypanel operators, but what
actually occurs in the system electronics is slightly
different.
When a keypanel operator activates a key to talk to a des-
tination located in another intercom system, the intercom
system’s master controller does not act itself to close any
crosspoints, but rather, it sends this information to the
trunking system via the data connection. The trunking
system master controller then checks for an available
trunk line. If one is available it notifies the master control-
lers in the affected intercom systems to establish the com-
munication path using the trunk line that it specifies. If no
trunk lines are available, the trunking system will notify
the master controller in the caller's intercom system,
which will then send a "busy" signal to the calling
keypanel.
If more than two intercom systems are interconnected,
additional trunk lines must be reserved and interconnected
between the systems. However, it is not always necessary
that two intercom systems be directly interconnected as
long as there is a path somewhere to connect the two sys-
tems. The trunking system can be programmed to permit
"cascaded" trunking in which a pathway is established
through multiple intercom systems to connect two
endpoints.
12.3
Trunking Connections and Setup
1.
Connect the trunking system components using the
appropriate wiring diagram in Figures
through
Note
To use the same PC for configuration of both ADAM CS
and the Trunking Controller, either use an RS232 switch-
ing box, or use separate COM ports on the PC. (CSedit
and CStrunk only recognize COM1 and COM2, with
COM1 as default. ADAMedit recognizes COM1 through
COM4, with COM1 as default.)
2.
Interconnect one or more intercom audio ports
between the intercom systems. These ports will be
used for trunking communication only. See Figures
through
for intercom system audio interconnect
cable wiring.
Note
The number of trunk lines that you setup should be based
on the number of persons that need to communicate with
other intercom systems, and on the critical nature of their
communication. On the other hand, there may be addi-
tional expense involved with running trunk lines (when
using phone lines for example) and you will want to keep
the number of lines to a minimum. You may be able to
ADAM CS Installation Manual 13
