handset to an ISDN terminal adapter, the quick call set-up capability of ISDN can be utilised.
GSM Data makes it possible to send data or fax information over the GSM network. When
making a data call, the user simply dials the number they wish to send information to. The call is
connected to a Gateway located at the GSM network operator, and then the Gateway takes care
of the translation between the different kinds of networks, such as PSTN, ISDN or X.25 net-
works. Currently the data transmission speed supported is up t 9,600 bps, but with new GSM
technologies being developed this will increase.
UU
UU
ss
ss
ii
ii
nn
nn
gg
gg
GG
GG
SS
SS
MM
MM
DD
DD
aa
aa
tt
tt
aa
aa
ff
ff
oo
oo
rr
rr
ff
ff
aa
aa
xx
xx
cc
cc
oo
oo
mm
mm
mm
mm
uu
uu
nn
nn
ii
ii
cc
cc
aa
aa
tt
tt
ii
ii
oo
oo
nn
nn
Sending a fax is very similar to sending data. When the Ericsson R320s is connected, using
infrared or cable, to a PC/PDA, the fax program in the computer will work as if it was connected
via an external modem, or a PC Card modem to a Þxed line. To send a fax, an initial call is made
to the network. The call is then routed through the network to the GSM Interworking Unit
(GIWU). The GIWU then establishes a connection to the remote fax machine. The fax protocols
are then passed end to end, between the PC/PDA via the phone, and the remote fax machine.
The Ericsson R320s supports fax speciÞcations Group III, class 1 and 2. Class 2 is recommen-
ded.
This section outlines the AT commands supported by the Ericsson R320s. The information here
can be of use for advanced users, to indicate the possibilities with the phone to:
¥ develop new communications software
¥ add the Ericsson R320s to an applicationÕs list of compatible modems
¥ adjust the settings of their mobile telephone and modem.
The infrared modem in the Ericsson R320s supports the V.25ter command set, which is the stan-
dard communication set used by modems.
The Ericsson R320s is compatible with industry de facto extensions, ETSI 07.05 and 07.07.
OO
OO
vv
vv
ee
ee
rr
rr
vv
vv
ii
ii
ee
ee
ww
ww
oo
oo
ff
ff
AA
AA
TT
TT
cc
cc
oo
oo
mm
mm
mm
mm
aa
aa
nn
nn
dd
dd
ff
ff
uu
uu
nn
nn
cc
cc
tt
tt
ii
ii
oo
oo
nn
nn
ss
ss
You use AT commands to conÞgure your mobile telephone, to request information about the
current conÞguration or operational status of your mobile phone, and to test availability and
request the range of valid parameters, when applicable, for an AT command.
The infrared modem can be set in any one of three modes of operation. These are:
Off-line Command
Mode The infrared modem is placed in off-line command mode when Þrst
powered up and is ready for entry of AT commands.
On-line Data Mode Allows ÒnormalÓ operation of the infrared modem, exchanging data or
facsimile with the remote modem.
On-line Command
Mode You can switch to on-line command mode when you want to send AT
commands to the infrared modem while still remaining connected to
the remote modem.
AA
AA
TT
TT
cc
cc
oo
oo
mm
mm
mm
mm
aa
aa
nn
nn
dd
dd
ss
ss
ss
ss
uu
uu
pp
pp
pp
pp
oo
oo
rr
rr
tt
tt
To Next Page
Loading...
