Specifications

Chapter 1 – Universal Socket Connectivity
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342F) 14
Universal Socket Configuration
Top View – Universal SocketModem Pinout
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
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
R
X
- (Ethernet)
RX+ (ISDN)
I
Receive Inputs (RX+ and RX-). Differential receive input pins for Ethernet and
ISDN. Dummy pin for MT800SWM.
7
RX+ (Ethernet)
R
X
- (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.
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 microphpone sections in GPRS, CDMA, EDGE
chapters.