Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Mains electricity wikipedia , lookup
Switched-mode power supply wikipedia , lookup
Electrical substation wikipedia , lookup
Public address system wikipedia , lookup
Portable appliance testing wikipedia , lookup
Buck converter wikipedia , lookup
Telecommunications engineering wikipedia , lookup
-SilAP HOOK LONGLINE DIALING SWITCH (MWENTARY CONTACT) SNAP-ACTION PUNCTURE FOR CONNECTS To TEST POST ‘DIAL. TALK. TEST” I “MONITOR, HANG-U? ROCKER SWITCH (SHOVJN IN “DIAL. TALK, TEST” POSlllON ...RED MARKING SHOWING) / / &WAY ALLIGATOR CLIPS / >dWAY TUBULAR SLIDERS (2) (MINIMIZE TANGLING) ALLIGATOR CLIPS (2) SUGGESTED USES: The No. 261 Telephone Handset provides I. .Troubleshootingprotective 2. Testing audibly for circuits’for presence 3. Monitoringtelephone caters. 4. Wmnunicating testing. 5. Dialing lines (speaking), telephone a convenient determining of voltage during via location on telephone installation testing lines and testing lines , with telephone numbers during means of performing as with a variety of opens, and other grounds telephone of dialer conventional and shorts, in lieu of a meter. circuits. of automatic recipients of functions: dialers messages during and digital installation comnunland telephones. DESCRIPTION: (See Diagram) The telephone handset, Hang-up” rocker switch ;n addition to its recei.ver and transmitter, and *Long Line DFalDng” manentary switch. Its attached five foot teninate in versatile and piercing insulation long leads are provided with two “tubular spring loaded alligator type clips which to insure good electrical contact. The large snap hook attached adjacent to the unites free” operation or for clipping to a belt. receiver has a dial, hro position sliders” to minimize incorporate a variety is convenient for “Dial, Talk, Test”/Vonitor, tangling. The two leads of ways of gripping wires hanging up the handset for “hands OPERATION: The handset’s rocker switch has two positions: = “Dial, Talk, Test” F?ed Marking Showing mck Marking Showing = ‘Wnitor, Hang-up” A second switch is a mcmentary.one and assists long line dialing. Position Position whi’ch, when depressed, reduces the circuit resistance through the handset I. Troubleshooting: a. Place the rocker switch In the ‘Qlbl, Talk, Test” (Red Marking Showlngl position. An open on a protective circuit may be located.by connecting the hpndset leads acrossthe posjtive (+I If voltase Is oresent at and neaative f-1 sides of the circuit at various pol’nts alonq the circuit. a partjcular polnt, a “click” wlll’be heard in the handset’s-receiver, 1,ts loudness dependent on the If no sound is heard, voltage is not present and an open is located between that point and voltage. the last place a click can be heard. /1 ‘__ ,.’ on a show window or elsewhere in a loop of the same polarity msy be detected by conb. An open in foil necting the handset across the suspected portion of the loop. If an open is present in the section being tested, a click will be heard‘(aIthough muchueakerthan from a positive and negative voltage). C. An lntermlttent ground or short on a protective circuit wi I I ‘result sound in the No. 261 when it is connected across the circuit wires. various points to determine when the sound ceases. in a “crackling” or “frying” The circuit should be opened at 2. Testing for voltage on telephone lines or.other circuits may be done simply by connecting the No. 261 across the wires in question with the rocker switch in the “Dial. Talk, Test” (Red) position. D.C. is indicated by a single click as the connection is made. A.C. results in a continuous hum after Iheconnection is made. 3. Monitoring placing the across the as long as of calls made by autcmatic telephone dialers or digital communtcators may be accomplished by No. 261’s rocker switch in the “Monitor, Hang-up” (Black) position and connecting its leads telephone lines: The presence of the’Mo. 261 will not affect the operation of the equipment, the switch is kept in the ‘Monitor, Hang-up” IBlack) position. . 4. CMnunicating (speaking) over the telephone lines directly to recipients of dialer messages during installation and testing greatly reduces the amount of tlme and uncertainty involved in testing.out all telephone numbers on the tape. and tape is installed and telephone a. After dialer switch in the “Monitor, Hang-up” (Black) position line in parallel with the dialer. b. Put DIALER switch C. Activate dialer in the “Connected and listen lines have been connected, and connect the No. 261% to phone lines? to number being place the No. 26lts rocker leads across the telephone position. called. d. At the completion of,the first dialed number wait until the the No. 261’s rocker switch to the “Dial, Talk, Test” (Red) “Disconnected frcm phone I ines” position. This will now put munication with the recipient of the call and enable him to first ring is heard and at tha& time push position and the DIALER switch to the the installer in direct telephone comverify that the right party has been reached. e. To hang up, simply Hang-up” Repeat steps f. “b” return through the No. 261’s “e” for switch to “Monitor, (Black). each number programned. 5. Dialing a telephone number may be accomplished as follows: Place the No. 261’s rocker Talk, Test” (Red) position, connect the No. 261 across the telephone lines, listen for To hang up, press the No. 261’s rocker switch to “Monitor, Hang-up” (Black). switch in the “Dial, dial tone, and dial. SPECIFICATIONS: Physical : *Length : Width: Thickness: **Height: Leads: 8 l/2” (21.6 cm) 2 l/2” ( 6.4 cm) I l/4” to I 3/4” (3.2 cm to 4.4 cm) 3” (7.6 an) 5’ (I.5 m) long with tubular sliders and wire clips *Not incl. 3” (7.6 an) long snap clip. **Resting on back, on flat surface. Weight: I8 oz. (0.5 Kg1 ALARM WCE MANUFACTURING CO. A DIVlSl5lDN OF PmY CoR#)RAXlDN 165 Green Way, Syosset, New York ll79l P3953 Rev. II78 32 ‘26 CoOIrtpN0 lsl? PIllwAV CoRFoaAm f-7