Rainbow Electronics FARGO MAESTRO 100 (with TCP_IP) - Manual (Page 762)

APPENDIXES
Technical Appendixes
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WM_DEV_OAT_UGD_049 - 001 APPENDIXES August 23, 2007
3.2.6.2 Wake up by Wavecom Wireless CPU ® (DCE) (unsolicited AT
response" e.g. "RING" is to be sent)
The Wireless CPU ® wakes up the DTE with a 27.010 protocol wake up frame first
and then sends its unsolicited indication.
The protocol preliminary wake up sequence is described below:
b
RX data line
1
2
3
4
TX data line
No data
Valid protocol
frame
F9F9F9F9 wake up
frame (order target to
wake up)
F9F9F9F9 wake up frame acknowledgement (inform
Application that target is waken up)
27.010 Test frame
1: DCE sends 27.010 protocol F9F9F9F9 frame to wake up the asleep Application.
2: DTE replies with 27.010 F9F9F9F9 wake up frame as acknowledgment and waits
for a valid frame.
: DCE sends a valid 27.010 test frame in order to have the target stop its
acknowledgment.
: DTE stops sending F9F9F9F9 answer after receiving the valid frame.
The entire "unsolicited string" wake up sequence and sending is described below:
RX data line
Wake Up
MSC frames
"RING"
Wake Up
MSC frames
Sleep On
MSC frames
Sleep On
MSC frames
"RING"
DTR (logical MSC frame sent by the DTE
Busy
1 0 2 3 3 1 0 2
0: The DCE is disturbed with an incoming call.
1: DCE starts sending F9F9F9 wake up frame, waiting for its response and sending a
valid test frame (0x4D ,0x55, 0x58, 0x57, 0x41, 0x4B, 0x45, 0x55, 0x50 =
MUXWAKEUP ). (Once waken up, the RI is sent before the RING string in our case)
2: The unsolicited response message is sent.
8 : After the unsolicited response has been sent, the port is in sleep mode again
(no more AT response and DTR low). Then DCE sends PSC to sleep on and
waits for its response.