User manual

Appendix-4 TECHNICAL INFORMATION
V.28 Definition of the electrical characteristics of so-called non-sym-
metrical polar lines
V.29 9600 bps, dedicated line operation; Fallback to 7200 or 4800 bps.
16-point quadratic amplitude modulation
V.32 9600, 4800 and 2400 bps with Fallback to 4800 bps dialling line or
dedicated line operation; synchronous and asynchronous, echo
suppression; 16/32-point quadratic amplitude modulation; differ-
ential Trellis Coding and/or non-redundant coding, full-duplex
V.42bis Error Correction and Data Compression Procedure to CCITT
Table 9 Technical Specifications
Parameter Spezifications
Methods of operation
Synchronous, asynchronous with manual and automatic dial-
ling (AT-commands; V.25bis);
Error Correction and Data
Compression
MNP Classes 1–5, 10 orV.42bis
Transmission rates and Modu-
lation procedure
See Chapter 1
Tolerance for deviation from
nominal speed
Max.: +1 (+ 2,3), -2,5%
Character length asynchronous 7, 8, 9, 10, 11 Bits (incl. Star and Stop bits)
Pulse adjustment in synchro-
nous mode
Internal: Local oscillator
Extern: Pulse loop (Receive pulse = send pulse)
Interface with telephone
network
Dialling line: 2-wire, full duplex
Digital interface Computer interface: V.24 Protokoll with V.28 level
Automatic dialling Pulse/MFV dialling
Input for automatic dialling Serial computer interface
Loudspeaker (external)
Software-controlled: 3 volume levels. Further adjustment via
potentiometer
Loudspeaker connection 3.5 mm latching jack (mono); impedance ≥ 4 Ω
MFV amplitude fluctuation <1 dB
Tone duration 90 ms
Frequency/key ratio with pulse
dialling
10 pulse/sec
39/61% (On/Off)
Guard tone 1800 Hz, or no Guard tone
Power supply 230 V ± 10% (external power supply)
Low-voltage jack:
Charging rate
Power supply
450 mA AC
8.5 VAC
Temperature range 0–45 ° C
Storage temperature -25–+70 °C
Air humidity max. 85% (Rel.)
Dimensions 140 * 85 * 33 mm (L*B*H)
Weight ca. 250 g without outlet power supply
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