User's Manual

Chapter 1 – Universal Socket Connectivity
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342D) 10
Universal Socket Configuration
Note: Pin 6 is RX- for the SocketEthernet IP. For ISDN, Pin 6 is RX+.
Pin 7 is RX+ for the SocketEthernet IP. For ISDN, Pin 7 is RX-.
Universal Pin Descriptions
Pin Signal
Name
In
Out
Type
Description
1 Tip I/O
Tip Signal from Telco. Tip connection to the phone line (RJ-11 Pin 4). The
SocketModem is Tip/Ring polarity insensitive.
2 Ring I/O
Ring Signal from Telco. Ring connection to the phone line (RJ-11 Pin 3). The
SocketModem is Tip/Ring polarity insensitive.
3 Safety Void NA
Safety Clearance. 2.5 mm is required between TNV circuits and SELV circuits.
4 TX+ O
Transmit Outputs (TX+ and TX-). Differential transmit outputs for Ethernet and
ISDN.
5 TX- O
Transmit Outputs (TX+ and TX-). Differential transmit outputs for Ethernet and
ISDN.
6 RX+ or
RX- (ISDN)
I
Receive Inputs (RX+ and RX-). Differential receive input pins for Ethernet and
ISDN.
7 RX- or
RX+ (ISDN)
I
Receive Inputs (RX+ and RX-). Differential receive input pins for Ethernet and
ISDN.
8 Safety Void NA
Safety Clearance. 2.5 mm is required between TNV circuits and SELV circuits.
11 TCLK O
Transmit Data Sync Clock. TX synchronous data clock for ISDN sync data mode.
12 RCLK O
Receive Data Sync Clock. RX synchronous data clock for ISDN sync data mode.
22 MIC+ I
Wireless GSM/GPRS, CDMA, EDGE.
23 MIC- O
Wireless GSM/GPRS, CDMA, EDGE.