User manual

101

USER MANUAL

• A burst of 1400 Hz. ±3% tone with a duration of 100 msec. ±5%

• A pause of 100 msec. ±5%

• A burst of 2300 Hz. ±3% tone with a duration of 100 msec. ±5%

Note: Transmitters shall accept a frequency error of at least ± 5% to ensure back-

compatibility with older receivers.

Message Blocks

A Message Block is sent by the TRANSMITTER for each message in the transmitter’s

message queue. Each message block contains sufficient information to report an

event in the system.

Placement

The first message block is sent beginning 250 msec. (250 min.,300 max.) after the

end of either the Handshake Tone sequence or after a Kissoff (Acknowledgement)

tone.

The delay is timed from the end of the tone.

Inter-Message Time

After sending its message, the transmitter should wait for 1.25 sec. for the start of a

Kissoff Tone from the receiver. If the start of a kissoff tone is detected, the

transmitter must continue timing the tone, even if the inter-message time expires.

The panel must detect a minimum of 400 msec. of the Kissoff Tone for it to be

considered to be valid.

If a Kissoff tone is detected, the transmitter should wait for the tone to end and then

wait 250 msec. (250 min.,300 max.) before beginning the next message.

If no Kissoff Tone is received, the transmitter should repeat the message after the

expiration of the 1.25 second inter-message interval.

Data Tones

The message is sent using standard DTMF tones.

The timing of the tones shall be as follows:

Burst ON time - 50 msec. (50 min.,60 max.)

Burst OFF time- 50 msec. (50 min.,60 max.)

The details of the tones are contained in the following table.

WT1010C2 – USER MANUAL – Rev.2.7 – Technical Support : Technical@witura.com