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A-2 User’s Manual
Satellite U500/U500D, Satellite Pro U500/U500D
Built-in Modem
This information is applicable to the models equipped with a built-in
modem.
Network control unit (NCU)
Type of NCU AA
Type of line Telephone line (analog only)
Type of dialling Pulse
Tone
Control command AT commands
EIA-578 commands
Monitor function Computer’s speaker
Communication specifications
Communication
System
Data: Full duplex
Fax: Half duplex
Communication
protocol
Data
ITU-T-Rec
(Former CCITT)
Bell
Fax:
ITU-T-Rec
(Former CCITT)
V.21/V.22/V.22bis/V.32/
V.32bis/V.34/V.90/V.92
103/212A
V.17/V.29/V.27ter/V.21 ch2
Communication
Speed
Data transmission and reception
300/1200/2400/4800/7200/9600/12000/14400/
16800/19200/21600/24000/26400/28800/31200/
33600 bps
Data reception only with V.90
28000/29333/30666/32000/33333/34666/36000/
37333/38666/40000/41333/42666/44000/45333/
46666/48000/49333/50666/52000/53333/54666/
56000 bps
Fax
2400/4800/7200/9600/12000/14400 bps
Transmitting level -10 dBm
Receiving level -10 to -40 dBm
Input/output
impedance
600 ohms ±30%
Error correcting MNP class 4 and ITU-T V.42
Data compression MNP class 5 and ITU-T V.42bis
Power supply +3.3V (supplied by computer)