User's Manual

Part 1 − Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342K) 11
Universal Socket Pin Out
Top View – Universal SocketModem Pin Out
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 f
r
om 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 mm 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.