Bosch Appliances 8555 Connection using Dial-up Modem Link, User-supplied dial-up, modem link

LTC 8555 Series Instruction Manual Installation EN 16

5.3.4Modem Interface Information When Using RS-232 Model Keyboards

RS-232 model keyboards can be connected to an Allegiant via dial-up modem link. The keyboard supports a rudimentary ability to dial a phone number of an attached modem. Further details for the dial-up feature will follow, in the operating instructions.

FIGURE 7 shows a typical system configuration using a modem connection.

Allegiant system main CPU bay

User-supplied

Allegiant-to-modem

interface cable

Modem

User-supplied modem interface cable

Modem

CONSOLE port on Allegiant	User-supplied dial-up	Junction box and power
system must be configured
	modem link	adapter supplied with
for
		LTC 8557 kit
RS-232 Keyboard mode

Figure 7: Connection using Dial-up Modem Link

A modem interface requires the cable connections below. A user-supplied cable suitable for RS-232 communications is required.

Allegiant System

Console Port 9-pin connector		Modem 25-pin connector
1	(Chassis Gnd)	1	(Chassis Gnd)
2	(Rx)	3	(Tx)
3	(Tx)	2	(Rx)
4	(CTS)	8	(DCD)
5	(RTS)	4	(RTS)
7	(Data Gnd)	7	(Data Gnd)

Tie pins 6 (DSR) & 20 (DTR) together

RS-232 Keyboard

Modem 25-pin connector	LTC 8557 Hookup Kit terminal
2	3
3	2
7	1
Tie pins 4 (RTS) &
8 (DCD) together

Bosch Security Systems 29 August 2003