Do not forget to share and love our reference to help further develop our website. Screw the box together and install the adhesive rubber feet. Click for his home page. Each pulse represents a digit. Note: There were no seperate model numbers for manual and dial versions. The Solid Back Transmitter Anthony White. Replaced by the 500C and 500D.
It was not really sorted out until the 1920s. Connect a 330 ohm ½ watt resistor between the two push in terminals along the edge of the board. When a number is dialed, the switching equipment counts electrical pulses made by the dial wheel as it returns to its normal position. Subsections on ringers, networks, handsets, dials, etc. The following description is from Western Electric's 1912 catalog.
Does your Princess 702B phone not ring? In this case, look up 500C or 500D. It is easy, you need to use the save link or you can put your cursor towards the graphic and right click then select save as. The other wire from the Touch Tone pad is connected to terminal L2 Y, where the Yellow mounting cord wire was originally connected. It doesn't matter if the telephone is manual, rotary, sidetone, anti-sidetone, candlestick, handset, or wall phone. Panel Connector Frame The panel system is partly a common control switching machine. Originally used in applications where the ringer circuit had to be brought out through the mounting cord.
For example, many phones marked 501D were converted from party line to single line 500D by removing the 426A tube as party lines lost favor. I really appreciate you taking the time to help me out. Does it have a 5-conductor line cord yellow, black, white, red and green wires? We make every effort to ensure the information contained here is as accurate as possible, but we will not be responsible for any errors or omissions, or anything resulting thereof. When switched on, the night light glows dimly when handset is on hook and a full brilliance when off hook. The Red and Green wires from a modular plug go to L1 and L2 on the coil to make the phone able to answer and dial out. Cannot be used as the tip party on message rate, automatic ticketing, automatic message accounting or zone restriction services. To Continue In English, Push 1.
For example, when the number 4 is dialed, 4 pulses are counted by the switching equipment as the dial wheel return to normal. Ringer loudness control on left side behind handset cord cutout. It was published by the Bell System and donated to this website by Paul Wills. For 1A1 or 1A2 Key Telephone Systems. The other end goes to the hook switch.
Note: the Control-F search only works for models on this page. Has square buttons on key pad. Step by Step System Step by Step is the oldest and simplest dialing system. Lamp illuminates when test mode is operating. Uses included room phones in hotels, motels and large apartment complexes, some sets had custom dial plate legends showing dialing instructions for services such as housekeeping, maintenance and local or long distance outgoing service. This Website contains a compilation of information already available elsewhere on the internet and therefore considered to be in the public domain.
As the telephone business grew, central offices grew in complexity. Mark the outline on the case. Ringing current is then applied to the called subscribers line and the ringing starts at the called subscriber's telephone set. I built the white one to use with colored plastic 302s. Replaced the 500H with tube. The other Touch Tone wire goes to terminal L2.
This is accomplished by bridging the telephones across the line and wiring them so that the generator is normally connected to the two sides of the line, but may be switched by the subscriber so that it is bridged between one side of the line and ground. Inside the cover of the sub set it looks like 554C in paint. The light is only activated when the handset is offhook. Do you have a web page on the older models? The Green wire labeled F on the board takes the place of the left push in terminal on these pads. Only 3 of the 4 buttons depressed. Since you have a modular cord on your phone, you must use a modular cord on the Touch Tone pad. Thank you for helping me get the ringer to work.