Installation Manual

Part 1 − Universal Socket Connectivity Chapter 1 – Universal Socket Connectivity
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342M) 14
Pin Signal
Name
In/Out Description
34
–RXD O
Received Data. The SocketModem uses the RXD line to send data to the DTE and to
send SocketModem responses to the DTE. In command mode, –RXD data presents
the SocketModem responses to the DTE. SocketModem responses take priority over
incoming data when the two signals are in competition for –RXD. When no data is
transmitted, the signal is held in mark condition.
35
–TXD I
Transmitted Data. The DTE uses the –TXD line to send data to the SocketModem for
transmission or to transmit commands to the SocketModem. The DTE holds this circuit
in mark state when no data is being transmitted or during intervals between characters.
36
–RI O
RING (Active Low). Incoming ring signal from phone.
Ring Indicate. –RI output ON (low) indicates the presence of an ON segment of a ring
signal on the telephone line. The modem will not go off-hook when –RI is active; the
modem waits for –RI to go inactive before going off-hook.
SocketWireless Bluetooth (MTS2BTSMI). Strobes 1/sec for slave indication.
37
–DSR O
Data Set Ready (Active Low). –DSR indicates SocketModem status to the DTE. –
DSR OFF (high) indicates that the DTE is to disregard all signals appearing on the
interchange circuits except Ring Indicator (–RI). It reflects the status of the local data
set and does not indicate an actual link with any remote data equipment.
38
–CTS O
Clear to Send (Active Low). –CTS is controlled by the SocketModem to indicate
whether or not the SocketModem is ready to transmit data. –CTS ON indicates to the
DTE that signals on TXD will be transmitted. –CTS OFF indicates to the DTE that it
should not transfer data on TXD.
39
–DCD O
Data Carrier Detect (Active Low). –DCD output is ON (low) when a data connection
is established and the SocketModem is ready to send/receive data.
40
–DTR I
Data Terminal Ready (Active Low). The –DTR input is turned ON (low) when the DTE
is ready to communicate. –DTR ON prepares the modem to be connected, and, once
connected, maintains the connection. –DTR OFF places the modem in the disconnect
state under control of the &Dn and &Qn commands.
Note: When the –DTR pin is not in use, it should be tied low.
41
GND GND
Logic Ground.
42
SPK- O
Cellula
r
GPRS, CDMA, and EDGE. Negative analog speaker output.
43
SPK+ O
Cellula
r
GPRS, CDMA, and EDGE. Positive analog speaker output.
48
GPIO* I/O
General Purpose Input/Output. User-configurable input or output pin. **
49
GPIO* I/O
General Purpose Input/Output. User-configurable input or output pin. **
50
GPIO* I/O
General Purpose Input/Output. User-configurable input or output pin. **
51
GPIO* I/O
General Purpose Input/Output. User-configurable input or output pin. **
56
–LED FD
X
O
LED Full Duplex (Active Low). LED Output. During normal operation, this pin lights
the FDX LED to indicate a full duplex mode.
57
–LED AC
T
O
LED Active (Active Low). LED Output. During normal operation, this pin lights the
Activity LED when transmitting or receiving. It flashes at a rate of 50ms high and 50ms
low when active.
58
–LEDLINK O
LED LIN
K
(Active Low). LED Output. During normal operation, this pin lights the LINK
LED to indicate a good link is detected.
* GPIO pins can be configured using the Universal IP AT Commands. Refer to the Universal IP AT Commands
Reference Guide on the CD included with the Universal Developer Kit.
** For MTSMC-H4-MI-IP, MTSMC-H4-MI-GP, MTSMC-EV2-MI-IP, MTSMC-EV2-MI-GP only.
Pin 58 LED Mode Operating Status
Note: Pin 58 may or may not be available on some EDGE/GPRS/CDMA SocketModems currently shipping.
Of
f
Subscriber Carrier Mode is OFF or running in SLEEP mode or
Alarm mode.
600 ms ON / 600ms OFF
No SIM card inserted or no PIN entered, or network search in
progress, or ongoing user authentication, or network login in
progress.
75 ms ON / 75 ms OFF / 75 ms ON
3 s OFF
Flashing or Blinking
One or more EDGE/GPRS/CDMA contexts activated.
Indicates EDGE/GPRS/CDMA data transfer: When a transfer is in
progress, the LED goes on within 1 second after data packets were
exchanged. Flash duration is approximately 0.5 s.
ON
Depending on type of call:
Voice Call: Connected to remote party.
Data Call: Connected to remote party or exchange of parameters
while setting up or disconnecting a call.