Panasonic KX-TAW848 Installation Manual page 106

3.2 Connection
External Modem Connection
PBX
Signal Name
RD (RXD)
SD (TXD)
ER (DTR)
DR (DSR)
After connecting the PBX and the external modem, set the power switch of the external modem to "ON",
then the external modem will be initialized with the default values.
The following AT command settings may be required for the modem:
• The Data Terminal Ready (DTR) signal should be ignored.
• The Data Terminal Equipment (DTE)/Modem flow control should be turned off.
• The data compression should be disabled.
• Error Correction is not necessary.
Notes
• Use an RS-232C straight cable for connection between the PBX and external modem.
• An AT command (for initialization, enabling automatic answer, etc.) can only be programmed by
KX-TAW848 Maintenance Console. "AT&F0Q0E0V1S0=1X0&D0" is stored as the default value.
• For more information about the AT command, refer to the external modem's instructions.
106 Installation Manual
RS-232C Port
(9 pin)
port assigned as the CO line destination
Pin No.
2
3
4
6
Modem
To RS-232C port
(25-pin)
To CO line/PBX extension
External Modem
Pin No. Signal Name
2 SD (TXD)
3 RD (RXD)
6 DR (DSR)
20 ER (DTR)