Operator services
85
14 • Operator services
Most items of the Operator Services menu (e.g.
Service numbers, Se) are subscription-
dependent and specific to operators: your mobile
phone readily supports them if they are included in
your subscription. Consequently, the menus shown
following may or may not be available. Contact your
network operator for detailed information on
availability and rates.
The services provided may involve making a phone
call or sending a SMS for which you may be charged.
The phone supports standard GSM strings that can be
sent from the keypad to the network and used to
activate services provided by the network.
•
Example n° 1
Press
*
4
3
#
, then
(
, to activate
the Call Waiting service.
•
Example n° 2
Press
*
#
3
1
#
, then
(
, to
know if the mobile identification has been sent.
•
Example n° 3
Press
*
6
1
#
, then
(
, to activate
the feature call forward if no reply.
•
Example n° 4
Press
*
6
2
#
, then
(
, to activate
the feature call forward if unreachable.
Contact your network operator for detailed
information on GSM strings.
Some phone services (such as phone answering
machines and pagers) require your phone to transmit
DTMF tones (Dual Tone Multi Frequency), also
known as “touch tones”. These are used to
communicate passwords, callback numbers, caller
choices, and so on.
You can send DTMF tones at any time during a call
by pressing any of the keys
0
to
9
,
*
and
#
. You can also attach a DTMF sequence to a
phone number before dialling it (or storing it in the
Phonebook
). The phone number and the DTMF part
must be separated by a wait character.
Pause and wait characters
To obtain a pause or wait character, press and hold
#
. The display shows
w
for a wait and
p
for a
pause. The phone always interprets the first pause
GSM strings
DTMF tones
Philips855_GB_MKG_4311 255 58331.book Page 85 Mercredi, 17. décembre 2003 4:32 16
