AT&T 993 2-Line Telephone User Manual


  Open as PDF
of 79
 
73
Appendix
Technical specifications
Operating temperature: 32°F — 122°F
(0°C — 50°C)
Power adapter input: AC 120V 60Hz
Power adapter output: AC 9V, 300mA
Backup battery: Alkaline 9V
Headset jack: 2.5mm, 32-150 ohm
 previous next