Group Paging Using The Telephone; Programming For The Rs232 Interface; Rs232 Db9 Pin Identification - JTECH Premises Installation, Programming And Operator Manual

Group Paging using the telephone: Group information can be preprogrammed
into the Pagers at your Distributor's site or JTECH. "Dynamic" Groups
can be programmed by the user. See "Add a Pager to a
Dynamic Group" on page 14 for more information.
Pick up the telephone and listen for the dial tone.
1.
Dial the telephone number that has been assigned to
2.
the Transmitter.
3. Listen for a beep that confirms the Transmitter is ready.
4. Within 8-10 seconds, use the telephone keypad:
a. Press the * key.
b. Enter the Group number (1-99) to page. Also see "Dynamic Group "
programming for more information.
c. Press the * key.
d. Enter a numeric message, if desired (16 digits maximum).
e. Press the # key to send the page.
5. A beep heard on the phone verifies that the message was sent.
6. Hang up the telephone.
Programming For The RS232 Interface: To communicate with
the Transmitter, the computer software must send RS232 1200
baud message information using the following protocol.

RS232 DB9 Pin Identification:

Pin 2 = Transmit Data from Transmitter to Host (Attached to Line
Driver Transmit Side).
Pin 3 = Receive Data from Host to Transmitter (Attached to Line
Driver Receive Side).
Pin 5 = Signal Ground.
Pin 7 = Request to Send Line from Host to Transmitter (Attached to
Line Driver Receive Side).
Pin 8 = Clear to Send Line from Transmitter to Host (Attached to Line Driver Transmit
Side) .
Pins 1, 4,6 and 9 are not used.
RS232 Baud Rate And Settings
1200,N,8,1 (1200 Baud, No Parity, 8 Data Bits, 1 Stop Bit).
RS232 Handshaking-Request To Send (RTS) - Clear To Send (CTS)
The Transmitter uses CTS to allow data out of the Host output buffer.

The Transmitter does not monitor RTS.

The Transmitter requires the host to stop sending data immediately, when

CTS signal switches from high to low. Incoming data is not monitored while
CTS signal is low.
High-speed serial port drivers may continue to send data after CTS signal is

switched to low. This condition causes data to be lost. Serial port drivers
having settings for the amount of buffered data ,should be set to 0.
7 Digit Message Format: Contains six parts:
1. Preamble (3 bytes)
2. Function Bit (1 byte)
3. Cap Code (7 bytes)
Preamble: Is a 3 character hex string that supplies start up synchronization
"padding" between messages IN, an output buffer, and information to the
Transmitter , that a message is coming. The Preamble is [Chr$(255)].
4. Separator (1 byte)
5. Pager Message (120 bytes max)
6. Terminator (1 byte)
5 4 3 2 1
9 8 7 6
7