Specifications

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6
Telco Sentinel Installation and Operation Manual
INSTALLATION
Jumper Settings
JP3: DTMF Tone detection jumper (Guard time)
The Telco Sentinel is equipped with a 4-position jumper, labeled “JP3” on its PCB. This is
used to adjust how quickly DTMF tones are detected. The settings are as follows:
F = Fast, 50ms ON / 50ms OFF
M = Medium, 100ms ON / 100ms OFF
S = Slow, 150ms ON / 150ms OFF.
To detect multi-tone bursts, the jumper should be left in the default position F = Fast.
USB Serial Operation
To control the Telco Sentinel, you must connect it to the USB port of a PC running a serial
terminal program such as HyperTerminal, or PuTTY. When you first plug the Telco Sentinel
into your PC it should automatically install the correct FTDI USB Serial “Virtual COM port”
drivers which will allow you to access the Telco Sentinel on a COM port. Set the terminal
program to 9600,8,N,1, flow control to NONE. Character Echo should also be turned ON.
NOTE: If the Telco Sentinel’s FTDI USB Serial “Virtual COM port” drivers do not auto-
matically install they may be downloaded here: http://www.ftdichip.com/Drivers/VCP.htm
Information Retrieval/Setup Commands
The (@) ampersat/at sign symbol is the beginning of string followed by the command/para-
meters. No carriage return or line feed is required. Commands are NOT case sensitive.
@Pnn – Sets the wait time between the receipt of an ASCII string and the generation of
DTMF tones. When <nn> is the number of 100ms units that it will wait after receiving an
ASCII string before sending DTMF. This is actually nn+100ms as there is an initial 100ms
wait when receiving ASCII before any processing is done. This number can be 00-99.
Command example: @P01 will set the DTMF generation delay to 200ms
Response example: P=01<cr><lf>
@P? – Returns the current stored DTMF generation delay value: P=<nn>
Response example: P=01<cr><lf>
@Rn – Sets the number of rings before auto-answer. Where <n> is a number 0-9, 1-9 is the
number of rings and 0 will disable auto-answer.
Command example: @R1 will set auto-answer to one ring.
Response example: R=1<cr><lf>
@R? – Returns the current ring value.
Response example: R=1<cr><lf>
@Sn – Sets the tone duration and tone spacing for generated DTMF tones.
Three spacing settings (<n>) are available 1, 2, or 3:
1=50ms tones with 50ms spacing.
2=100ms tones with 100ms spacing.
3=500ms tones with 500ms spacing.
Command example: @S1 will set tone duration and spacing to 50ms.
Response example: S=1<cr><lf>
@S? – Return the current tone duration and tone spacing value.
Response example: S=1<cr><lf>
@U – Return unit model and firmware version :<product name> <version><cr><lf>
Response Example: BTI TELCO SENTINEL v1.06<cr><lf>
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