Specifications

Part 1 - Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342P) 12
Universal Socket Pin Out
Top View – Universal SocketModem Pin Out
Important Note:
Not all products include all pins as shown above and listed below. See the Mechanical Drawings section in each
product chapter for the pins used by that product.
Universal Pin Descriptions
Pin
Signal
Name
In/Out
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-
I
Receive Inputs. Differential receive input pins for Ethernet. Dummy pin for
MT810SWM-IP.
7
RX+
I
Receive Inputs. Differential receive input pins for Ethernet.
8
Safety
Void
NA
Safety Clearance. 2.5 31mm is required between TNV circuits and SELV circuits.
9
Dummy
Dummy pin for EDGE.
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
Microphone positive input. See microphone sections in GPRS, CDMA, EDGE
chapters.
23
MIC-
I
Microphone negative input. See microphone sections in GPRS, CDMA, EDGE
chapters.