BELGACOM Forum 500 Specifications download pdf (Page 33)

Connectible Devices 31

Installation

networking two Forum 500 communications systems in a Q.SIG

trunk (also refer to PBX Networking starting on page 74).

Up to eight devices per bus (ISDN telephones, ISDN fax

machines, ISDN base stations, ISDN cordless telephones, ISDN

adapters for the PC) can be connected to the internal S

ports by

twin-pair cables. The power for three of these devices can be sup-

plied by the bus; if more devices are used, they then require their

own power supplies. The internal S

buses enable point-to-multi-

point calls as per the DSS1 protocol (Euro-ISDN).

Ports

A system terminal can be connected to every U

port by a

twin-wire cable.The Forum Phone 510, the Forum Phone 520

and the Forum Phone 530 are cord-bound system terminals. The

Forum Phone 520 and the Forum Phone 530 can be cascaded on a

adapter (Module 2nd Forum Phone) so that you can operate

two Forum Phones on one U

port. For further details, refer to

the “Forum Phone 520, 530” user guide.

The Forum Base 500 base station is required for the use of cord-

less system telephones (e.g. Forum Free 560 or Forum Free 570).

If this base station is connected to a U

port, four simultaneous

calls are possible with the mobile parts. If the base station is con-

nected to two U

ports, eight simultaneous calls are possible.

However, note that only as many external connections are possi-

ble as there are connected B-channels available.

If you use a cordless handset such as the Forum Free 560, this

can also be contacted by other base stations using the GAP/CAP

standard.

You can also operate the Forum Phone 510 ISDN terminal on a

port.

a/b Ports

The a/b ports a/b1 to a/b4 can be used for connecting analogue

terminals. These can be for voice or data communication, and use

DTMF dialling, e.g.

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BELGACOM Forum 500 Specifications Page 33