User's Manual

MM-5100 Hardware – User Manual
Jan. 22, 2003
14 of 18
Table 3.5 15pin D-SUB connector pin information
Pin No. Signal Signal Description
1 DCD The On condition on this signal line, as sent by the MT2, informs the TE2
that it is receiving a carrier signal from the remote TE2 that meets its
criteria.
3 TXD Sending data signal from TE2 to MT2 serially.
2 RXD Receiving data signal from TE2 serially.
6 DSR This signal, in conjunction with DTR, indicates equipment readiness.
DSR is turned ON by the MT2 to indicate to the TE2 it is ready to receive
or transmit data.
13 DTR This is a signal turned ON by the TE2 to indicate to the MT2 that it is
connected to the line.
8 CTS The signal is turned ON by the MT2 to indicate now it is ready to transmit
data. (In the case of Hardware flow control)
7 RTS The signal is turned ON by the TE2 to indicate now it is ready to receive
data. (In the case of Hardware flow control)
10 RI The ring indicator is turned on by the MT2.
Mobile device informs arrival message of voice call to TE2.
11 DM_TXD Sending data signal (for DM) fromTE2 to MT2 serially.
12 DM_RXD Receiving data signal (for DM) from TE2 serially.
5 VCC Power supply(for DM), DC +3.8V(typical)
14 GND Ground(for DM)
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(Note1) The signal name is based on TE2.
(Note2) TE2: DTE - PC or PDA APPLICATION
(Note3) MT2: DCE - MM-5100 Wireless Modem
(Note4) A RS-232 transceiver (ICL3288xx) for serial communication with HOST is installed in MM-
5100 Wireless Modem.