Appendix

Technical specifications

RF frequency band

1921.536 MHz — 1928.448 MHz

 

 

Channels

5

 

 

Operating temperature

32°F — 122°F

 

0°C — 50°C

 

 

Dial pad charger voltage

96 — 127 Vrms

(AC voltage, 60Hz)

 

 

 

Dial pad voltage

3.2 — 4.2 VDC

 

 

Dial pad charger voltage

6VDC @200mA

(AC adapter output)

 

 

 

Replacement battery

3.7V 170mAH

 

 

Dial pad operating range

This dial pad operates within the maximum power allowed by the Federal Communications Commission (FCC). Even so, this dial pad and headset base can communicate over only a certain distance — which can vary with the locations of the headset base and dial pad, the weather, and the construction of your home or office.

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AT&T TL7650, TL7651, TL7601 user manual Technical specifications, Dial pad operating range