Caller ID is a data signal generated by the phone company’s central office (CO). The type of Caller ID signal that will be sent by a phone company will depend on the type of equipment in use at their CO.
Caller ID signaling formats vary throughout the world. At present, there is four basic formats with local variations of each format type. By setting the proper combination of internal jumpers (shunts), the Whozz Calling? unit can capture any of these four basic Caller ID signaling formats. The four basis formats are:
Bellcore 202 - USA Type. Sent in many countries. FSK sent between the 1st and 2nd ring cycle.
British Telcom - Only sent in United Kingdom. FSK sent before the 1st ring cycle.
ETSI - Sent primarily in Western Europe. FSK sent after very short 1st ring.
DTMF - Sent in regions that use older CO equipment. DTMF (touch-tones) sent before the 1st ring.
Note
Refer to the table in Fig. 9 on the next page for more information on known formats in particular countries.
The standard factory setting for Whozz Calling? units is to capture Bellcore 202 type Caller ID. If the signaling format was determined in advance of the unit being shipped, the Whozz Calling? may be set for an alternate format.
In order to configure the unit to a different Caller ID signaling format, the top of the enclosure must be removed and shorting jumpers moved on the circuit board. Use the following steps and refer to Fig. 9 on the next page.
Remove power to the unit.
Remove the top of the enclosure by first removing the four Phillips head screws on the bottom of the unit.
Slide the top of the enclosure off.
Locate the shorting jumpers on the circuit board used for Caller ID signaling formats using Figure E.1, “Configuring Unit for Different Caller ID Signaling Formats”.
Slide off the appropriate jumper(s) and reconnect as per the table below the diagram.
Replace the top of the enclosure and replace the four screws.
