Operating voltage and current
+5 volts (V) at 435 milliamperes (mA); +12 V at 30 mA
Operating temperature
0° C to 40° C (32° F to 104° F)
Operating humidity
20 percent to 90 percent noncondensing
Operating altitude
0 to 3084 meters (0 to 10,000 feet)
Storage temperature
-40° C to +65° C (-40° F to +149° F)
Data communication standards
56,000 bits per second (bps) - K56flex V.90
33,600, 28,800, 26,400, 24,000, 21,600, 19,200, 16,800 bps - ITU V.34/V.FC
9600, 4800 bps - ITU V.32
2400 bps - ITU V.22 bis
2400 bps - Bell 212A
1200 bps - ITU V.22
1200/75 bps - ITU V.23
300 bps - ITU V.21
300 bps - Bell 103
Group 3 fax communication standards
14,400, 12,000 bps - ITU V.17
9600, 7200 bps - ITU V.29
4800 bps - ITU V.27 ter
2400 - ITU V.21
Miscellaneous specifications
AT command set
Extended Hayes AT command set
Error control
ITU V.42 (LAP-M), MNP Classes 2-4
Data compression
ITU V.42 bis
Data transmission and format
Full- or half-duplex operation, synchronous or asynchronous modes
Dialing capability
Tone or pulse dialing, automatic dialing
The International Telecommunications Union (ITU), one of the organizations working on forming international standards for communications, announced the ratification of the V.90 standard for 56K modems. Before the ratification of the V.90 standard, there were two proposed standards for 56K modems, x2 and k56flex. The optional internal 56K modem supports both the V.90 and k56flex standards.