Silicon Laboratories SI2493/57/34/15/04, SI2494/39 manual Wait for Kissoff tone, Ath

AN93

Table 145. Ademco® Mode of Operation (Continued)

Step	DTE-to-Modem Command	Modem-to-DTE	Remarks
		Indication
15	AT+VTS=9,9,9,9,1,8,1,*,#,A,0,0,0,0,0,3	OK	First Data Block is transmitted.
			Note: Data octets are placed
			after the “=” and separated by
			commas.
			Note: Host DTE driver must per-
			form these substitutions,
			Octet B as *
			Octet C as #
			Octet D as A
			Octet E as B
			Octet F as C
			Note: OK is sent at end of trans-
			mission.
16	Wait for Kissoff tone
17			1.25 s has elapsed. But modem
			still has not reported <DLE><c>
			to DTE
18	AT*Y254:Q83FB	01AF	Check to see if start of a Kissoff
			Tone has been detected?
			A non zero response (i.e. not
			0000) from modem denotes start
			of tone is detected. Modem will
			send <DLE><c> to DTE after it
			has verified that the Kissoff Tone
			burst duration is valid.
19		<DLE><c>	Acknowledgement from
			RECEIVER detected.
			Note: <DLE><c> is sent at end
			of tone burst.
20	Delay 250 ms before sending next Data Tone
	Message.
	Repeat from Step 15 for sending more Data
	Codes
	ATH	OK	Hang up at end of session.

232 Rev. 1.3