AVT MAGIC - A2.2 RS232 C-Interface; A2.3 TTL USER I;O Interface

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Interfaces
A2.2 RS232C-Interface
The RS232C interface is used for configuring and monitoring the MAGIC
ISDN Telephone Hybrid system with a PC. To connect the system to the PC a
null modem cable, in which pin 2 and pin 3 are crossed is required. Addition-
ally, pin 5 GND, must be connected. All other pins are not essential.
A2.3 TTL USER I/O Interface
External operating signals can be sent through this interface. Three signals are
always used to drive the relay within in the system.
TAB. 10 PIN ASSIGNMENT: RS-232-INTERFACE
Connector: RS232C (SUB-D, 9-pole, male)
Pin Signal Electrical Characteristics
1Not usedType:DTE
Level: V.24
Data Rate: 19200 Baud
Transmission Range:max. 15 m
Protocol: 1 Start bit
8 Data bits
1 Parity bit
1 Stop bit
2RXDReceive Data
3TXDTransmit Data
4 DTR Data terminal ready
5GNDGround
6 DSR Data set ready
7 RTS Request to send
8CTSClear to send
9Not used
TAB. 11 PIN ASSIGNMENT: USER I/O-INTERFACE
Connector: TTL USER-I/O (SUB-D, 9-pin, male)
Port Signal Electrical Characteristics
1 MSN switchover input
+5V: MSN-1 (level without switching)
GND: MSN-2
Level: TTL/CMOS
Rating: 20 mA
2 Used for relay 1
3 TTL 3 IN/OUT
4 Used for relay 2
5GND
6 TTL 5 IN/OUT
7 used for relay 3
8 TTL 7 IN/OUT
9 TTL 8 IN/OUT
1
5
6
9
1
5
6
9