Microsoft Windows Logo Program System and Device Requirements — 116
B126.96.36.199.3.2 If wireless support is implemented, Mobile PC modem supports +WS46 command
Wireless modems and look-alike modems include the common types, such as North American analog cellular, cellular digital packet data (CDPD), GSM, and other digital cellular systems, as well as several other types.
B188.8.131.52.3.3 All wireless and cellular modems must use the +WS46 command, which selects the WAN.
The TIA-678 +WS46 command has codes to indicate the system in which the modem can operate. For example, the following values, quoted from Table 4 of the standard, are useful.
Public telephone network (that is, a normal wireline modem)
TIA-553 analog cellular system
Metricom Ricochet network
GSM digital cellular system
TIA IS-95 CDMA digital cellular
TIA IS-136 TDMA digital cellular (Personal Communications System)
Windows has registry keys that support analog cellular modems. Windows also supports data access in GSM and other wireless modem types.
B184.108.40.206.3.4 If digital cellular control is implemented, Mobile PC modem supports appropriate +C digital cellular standards
If digital cellular support is implemented, the following appropriate digital cellular control standards must be supported.
System and services
GSM system: data, fax, voice
North American CDMA: data and fax
North American TDMA: data and fax
Digital cellular communications equipment must default to using error correction on the radio link. For example, for GSM 7.07, the modem must initialize to +CBST=,,1 (which selects a “nontransparent” air interface).
To allow data cards to use GSM/ISDN V.110 “fast access” where available in the network, +CBST=71,, ( 9600 bits per second (bps) V.110) must be a valid setting.
B220.127.116.11.3.5 If SMS support is implemented, the modem supports appropriate +C SMS control commands
To allow software applications to specify settings and manipulate short messaging services (SMS) through a GSM modem card, the card must support the following GSM 07.05 commands:
+CMGF: Message Format
+CMGL: List Messages
+CPMS: Preferred Message Storage
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