Rainbow Electronics FARGO MAESTRO 100 (with TCP_IP) - Manual (Page 760)

APPENDIXES
Technical Appendixes
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WM_DEV_OAT_UGD_049 - 001 APPENDIXES August 23, 2007
8 : When DTR is low and there are no more AT responses, the DCE sets CTS to
low..
Once the last opened DLCI detects the DTR drop from the PC application, the CMUX
driver starts sending a 27.010 PSC protocol frame, and waits for its response before
allowing the entire system to go into Sleep Mode state.
Clear to Send
PSC response
PSC frame
Not Clear to Send
TX data line (DTE)
RX data line (DTE)
1
2
3 4
1:: All the logical CTS are set high (each connected application can see CTS low)
2: Last CTS drop causes Wavecom Wireless CPU ® (DCE) CMUX driver to send a PSC
frame and to wait for the PSC response.
: Application replies with a PSC response
: All Wavecom Wireless CPU ® serial virtual ports are in sleep mode state.
3.2.6 Wake Up Procedure
There are two different ways of waking up the Wireless CPU
® :
3.2.6.1 Wake up by DTE (e.g. desktop PC) wakes up Wireless CPU ® with a
27.010 Wake up frame
In order to wake up the Wireless CPU ® , the client application has to trigger one of its
connected DTR high like the physical scheme.