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Call Waiting Switch Instructions
The Call Waiting Switch is designed to operate with newer higher speed modems on dial lines that have Call Waiting service provided by your local telephone company. Because of the improved error correction algorithms on these modems, the CW tone is largely ignored during an on-line session making it invisible to the user.
The CWS has a sophisticated precision signal processing algorithm that distinguishes the CW tone from the overlapping modem signal that are occurring simultaneously. When the CW signal is detected, it will alert the user and provide an option to take the waiting call. The CWS is normally used with voice sets connected to the "Phone Port". However, it can be used with any type of analog device, such as a fax, answering machine, monitoring equipment, announcer, etc.
Note that "tone" type Call Waiting Service is required from your local telephone company. This product will not work with the very old "click click" type of interruption service.
You may also use the *70 dialing prefix to disable call waiting with this product. If used, the caller will get a busy instead of a ring signal.
Accepting a Waiting Call
When the CW Tone is detected, the CWS provides an audio "beep beep" and a flashing (LED) to Alert you. It provides several methods of taking the call; or ignoring it.
1) The Flash Hook method allows you to simply pick up the handset connected to the CWS and begin talking. For voice applications, this is the quickest. It puts the ISP "on hold" and you may be able to sneak in a 10-30 second conversation and retrain before your ISP or the telco knows you are gone.
2) Using the Push Button method, you simply push the "modem Disc Button" on the CWS. The device connected to the "Phone Port" will ring along with all of the devices connected to the line. This allows someone else or something else such as a fax or answering machine to take the call. When the call is taken, your modem is disconnected and remains disconnected for 12 seconds. During this time the "Modem LED" will flash and the modem may not be used. When the modem is re-dialed, most Internet browsers will re-connect at point of interruption.
Toggle Switch (Auto/Manual)
When the CW Alert is received with the switch in the Auto position, the CWS will automatically accept the call, simulating the Push Button mode previously described. In the Manual position, you much manually accept the call using the Flash Hook or Push Button methods.
LEDs monitor line status:
PWR - Power is supplied to the CWS.
BUSY - Line is in use by another device.
MODEM - Modem is using the line.
CALL WAIT - Call waiting tone is detected.
Note that the Ports are labeled assuming connection of the most commonly used devices. However, other analog devices may be connected to the ports depending on the application of the CWS.
1) Connect the AC Power. The "PWR" and the "BUSY" LEDs should illuminate.
2) Connect the modem to the port labeled Modem using the cable supplied.
3) Connect the voice set or other answering device to the port labeled Phone.
4) Connect the telephone line to the Port labeled Line. The Busy LED should go OFF, verifying a good Telco connection.
1) Pick up the handset or other device connected to the "Phone Port". The Busy LED should illuminate and a dial tone should be hears.. Hang Up.
2) Dial the modem and wait for it to connect. The Modem LED should illuminate.. Stay connected.
3) While the modem is connected, use a cell phone or another line to dial the call waiting line. The "Call Wait" LED should Flash and the alarm should sound.
4) Accept the call using either method. The Modem LED should flash for 12 seconds.
When using the "Flash Hook", increase the S-10 register setting in your modem. Otherwise it may give us and disconnect before the ISP's modem. This also makes your modem less susceptible to other line noise which may be interpreted as false hits.
When using the CWS on a fax line you may want to precede your fax dial with a *70 to prevent the CW tone from interfering with the transmission