Silicon Laboratories SI2493/57/34/15/04 manual Ademco Mode of Operation, Handshake Tone Detection

AN93

8.2.1.1. Handshake Tone Detection

Two tone detectors are reconfigured for detection of the 1400Hz and 2300Hz tones. When a valid tone burst is detected the modem reports it to the host DTE in the V.253 event format as follows.

Event	Modem-to-DTE indication	Remarks
1400 Hz tone burst detected	0x10, 0x63	Character pair <DLE><c> is sent to DTE
		at the end of the valid tone burst.
2300 Hz tone burst detected	0x10, 0x65	Character pair <DLE><e> is sent to DTE
		at the end of the valid tone burst.
8.2.1.2. Session Example

Table 145. Ademco® Mode of Operation

Step	DTE-to-Modem Command	Modem-to-DTE	Remarks
		Indication
1	AT*y254:w8686,1AA,CCDF,C73B,C001,0	OK	Initialize 2300 Hz tone detector.
	AT*y254:w868B,1AA,D3D1,C39A,3FFF,DDD	OK	Note: This step must be done
	AT*y254:w8690,1AA,C34B,C35F,3FFF,54A0	OK
	AT*y254:w8695,C,400	OK	after a reset or ATZ. But it is not
	AT*y254:w8697,7BE,E050,CC04,3FFF,345F	OK	needed for every call.
	AT*y254:w869C,7BE,BF39,CA8D,3FFF,37B5	OK
	AT*y254:w86A1,C,300,C00,CCD	OK
2	AT*y254:w86A5,100,2A44,C480,C001,0	OK	Initialize 1400 Hz tone detector.
	AT*y254:w86AA,167,25BC,C22F,3FFF,EC95	OK
	AT*y254:w86AF,167,303D,C21E,3FFF,BEF2	OK	This step must be done after a
	AT*y254:w86B4,C,400	OK	reset or ATZ. But it is not needed
	AT*y254:w86B6,812,1E2F,C772,3FFF,D55F	OK	for every call.
	AT*y254:w86BB,939,3394,C6FC,3FFF,D345	OK
	AT*y254:w86C0,1000,0,0,0,0	OK
		OK
	AT*y254:w86C5,C,140,8c0,CCD
3	ATE0:UAD40	OK	Set UAD.6 to enable Ademco
			mode tone detections.
	AT:UAD&FF7F	OK	Clear UAD.7 to disable SIA
			mode.
5	AT:R48	0064	DTE reads and records what is
			the normal “tone off” duration for
			DTMF dialing. This parameter is
			country dependent. This param-
			eter will be modified for Data
			Tones transmission later.
6	AT+FCLASS=8	OK	Put modem into V.253 voice
			mode.

230 Rev. 1.3