RTS TM-2000 Uživatelský manuál stáhnout pdf (Strana 13)

TM-2000 & MTM-2000 User Manual Description and Specification 9

Bosch Security Systems, Inc.

User Manual

F.01U.193.264

Rev. 12

Understanding Trunking

In a trunking system, the audio lines (not data) of one (1) or more intercom ports are interconnected between two (2) 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 RS-485 data link is also

connected from each intercom system to the Trunk Master for exchange of system control signals. The main difference

between the TM-2000 and the MTM-2000 is the number of intercom systems it can communicate with. The TM-2000

supports up to 31 ports (see the note below), whereas the MTM-2000 can support up to 16 ports. Once the interconnections are

completed, the Trunk Master is programmed, using TrunkEdit, to recognize the individual intercom systems.

After the Trunk Master has been programmed, system administrators or keypanel users in each intercom system may request

lists of people, party lines, etc. from other intercom systems for the purpose of key assignment just as they would in their own

intercom system.

After keys are assigned, keypanel operators can activate, talk or listen to them as they would in their own intercom system.

There is no apparent difference to keypanel operators, but what occurs in the system electronics is slightly different. When a

keypanel operator activates a key to talk to a destination located in another intercom system, the intercom system’s master

controller does not close any cross-points, but rather, it sends this information to the Trunk Master via the data connection. The

Trunk Master then checks for an available trunk line. If one (1) is available, it notifies the master controllers in the affected

intercom systems to establish the communication path using the trunk line that it specifies. If no trunk lines are available, the

trunking system notifies the master controller in the caller’s intercom system, which then sends a busy signal to the calling

keypanel.

If more than two (2) intercom systems are interconnected, additional trunk lines must be reserved and interconnected between

the systems. However, it is not always necessary that two (2) intercom systems be directly interconnected as long as there is a

path not more than one (1) system away to connect the two (2) systems. The trunking system can be programmed to permit

cascaded trunking in which a pathway is established through an intermediate intercom system to connect two (2) endpoints.

NOTE: The system and its software only support a single level of cascade. For example, System A wants to talk to

System C, but it does not have a direct connection to System A and to System C. System A can talk to System C

by going through (cascading) System B. However, it would be impossible for System A to talk to System D if it

had to go through both System B and System C to do so, because that would require two (2) levels of cascade.

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RTS TM-2000 Uživatelský manuál Strana 13