ET-410 DuoFone Cordless Telephone System
(430-0551A)                Specifications             Faxback Doc. # 17895

                                 Base Unit           Handset Unit
Transmit Frequency [MHz]         46.610 to 46.970    49.670 to 49.990
Receive Frequency [MHz]          49.670 to 49.990    46.610 to 46.970
Transmit RF Output [mV/m]        Max. 10 (at 3m)     Max. 10 (at 3m)

Telephone Specifications

Dialing Rate [P.P.S.]:...................................................10
Make/Break Ration [P.P.S.]:...........................................39:61
Inter-Digital Pause [ms]:...............................................850
Memory Capacity (Pulse or Tone):..................................28 digits
Redial Memory Capacity:...........................................32 digits
Memory Position Capacity:.......................................32 stations

Power Requirements

Base Unit:.....................120 Volts, 60 Hz AC (240 Volts, 50 Hz for UK
                                          models available only in the UK).
Handset Unit:.................Rechargeable Nickel-Cadmium batteries DC 4.8V
                                                                 (1.2V x 4)

Telephone Connections

Use modular connectors (USOC type RJ-11C or RJ-11W)

Operative Temp.                          32 degrees F - 113 degrees F
                                         (0 degrees C - 45 degrees C)

                                     Unit     Nominal     Limit
Pulse Dealing

Manual Access Pause                  sec.        2.0      1.8-2.2
Flash                                sec.        0.7      0.5-0.9

Signal Level

Duration of Signals                  ms          100      90 (min.)
Inter-Digital Time                   ms          100      90 (min.)

Handset Unit

Receiver

Sensitivity at 20dB S+N/N            uV          2.0      4.0
Frequency Response at 300Hz          dB          2.0      2.0 +/- 6.0
                      3000Hz         dB          -11      -11 +/- 6.0
Audio Output Power at High           mV          30       16
                   at Low            mV          7        4
Ringer & Call Sound Level at High    dB SPL      88       78
                          at Low     dB SPL      76       67

Transmitter

Modulation sensitivity at 2kHz Dev.  mV          18       5 - 36

Base Unit

Receiver

Call Sound Level at High             dB SPL      76       67
                 at Low              dB SPL      68       60

NOTES:  Nominal specs represent the design specs; all units should be able
        to approximate these--some will exceed and some may drop slightly
        below these specs.  Limit specs represent the absolute worst
        condition which still might be considered acceptable; in no case
        should a unit perform to less than within any limit spec.

        The following sections can be found in the Basic Service  Manual
        43-0551, dated March, 1985:  The Alignment,  Troubleshooting Chart,
        Wiring, IC Interconnection and Voltage Chart.

LIGHTNING

This Radio Shack phone product has built-in protection circuits--that meet
or exceed FCC requirements--to reduce risk or damage from surges in
telephone and AC power line currents.  However, an incident such as a
lightning strike near, or directly to, these lines may cause an excessive
surge of voltage that can do damage to the phone device.

Lightning damage is uncommon, but it can occur to phones and other
electronic devices.  If this is a concern or there are frequent and/or
severe electrical storms in the area, we suggest unplugging electronics
products during a storm.


(cjs/all-11/13/95)