Specifications
31
User’s Manual - SM19202 Fast Poll Modem
RS-232 (DTE) Interface
Table B-2. RS-232 (DTE) Interface
Signal Name
Modem Input/Output
DB-9 Pin
Description
DCD
Output
1
Data Carrier Detected
RXD
Output
2
Receive Data
TXD
Input
3
Transmit Data
SG
5
Signal Ground
DSR
Output
6
Data Set Ready
(Modem Ready)
RTS
Input
7
Request To Send
CTS
Output
8
Clear To Send
RS-485 (DTE) Interface
Table B-3. RS-485 (DTE) Interface
RJ-11 Pin Number…
Corresponds to Signal Name
Modem Input or Output
1
Not Used
NA
2
RxD+
Output
3
RxD-
Output
4
TxD+
Input
5
TxD-
Input
6
Not Used
NA
Environmental Specifications
Operating temperature:
-40 to + 85
o
C
Storage temperature:
-40 to +125
o
C
Operating humidity:
5 to 95 %, non-condensing
Line isolation:
3750 V RMS
Surge protection:
Leased line up to 15K VA
