Installation manual

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Operator Manual for Mastercall MC-4044 Series 8 G99120A Issue 3 Page 9
PC RS232 COM 1 (Configured as DCE)
PIN DESCRIPTION
1 CD (Common to Modem)
2 RI (Common to Modem)
3 RXD (Data received by PC)
4 DTR (Common to Modem)
5 TXD (Data Transmitted by PC)
6 Ground
7 RTS (Common to Modem)
8 CTS (Common to Modem)
MODEM RS232 COM 2 (Configured as DCE)
PIN DESCRIPTION
1 CD (Common to PC)
2 RI (Common to PC)
3 RXD (Data received by Modem)
4 DTR (Common to PC)
5 TXD (Data Transmitted by Modem)
6 Ground
7 RTS (Common to PC)
8 CTS (Common to PC)
POWER
PIN DESCRIPTION
1, 2
12 → 48 Vdc, isolated,
polarity insensitive