User's Manual

Table Of Contents

Connecting National Instruments modules 123

Figure 36 "National Instruments Modules connected to DECT Messenger"

(page 123) shows a configuration of three rails with National Instruments

modules connected to a DECT Messenger. The three rails with modules

are connected together through the RS-485 bus.

Note:

A multi rail configuration is not part of the standard product, and

is only available on a Project basis.

Figure 36

National Instruments Modules connected to DECT Messenger

Note: The connection between the DECT Messenger computer and

the first rail is achieved using V.24. Therefore, the maximum cable

length is determined by the V.24 characteristics and the cable type.

If you have more than one rail (only available on Project basis), the

connection between the rails (and therefore the connection between the

FP-1000 and FP-1001 modules) is achieved using an RS-485 connection.

This is a four wire bus connection that allows a maximum distance of

approximately 1000 metres.

Instead of using an FP-1000 module as Controlling Module on a rail, the

FP-1601 module can be used. The FP-1601 module has an Ethernet

interface to DECT Messenger instead of the V.24 interface. However, this

module is not supported in the standard DECT Messenger product.

Nortel Communication Server 1000

DECT Messenger Fundamentals

NN43120-120 01.06

17 October 2008