Abus AZWG10020 Installation And Operating Instructions Manual page 117

GSM Omit 1st Digit
If "GSM Omit 1st Digit" is activated (ON), the first digit of the stored contact
telephone number for a GSM connection is not dialed.

If you want to make calls from a telephone of a private branch
exchange into the public telephone network, you must first
dial what is known as the exchange access code (code for an
outside line) before you dial the telephone number.

In this case the exchange access code must be the first digit
of the telephone number of the contact. This is followed by
the actual destination telephone number. The exchange
access code is available from the administrator of the private
branch exchange or in the instructions of the private branch
exchange. It is usually the number "0"; in the UK it is usually
the number "9". Format of the telephone number: "0 0123
4567890".

The device can thus be connected to an analog extension of
a private branch exchange. This extension does not
necessarily have to be set up for automatic outside line
dialing.
On a private branch exchange, if you are using an extension that is
programmed for automatic outside dialing, or if you are using a regular
analog telephone connection, select "GSM Omit 1st Digit: OFF".
SMS messages are normally sent only via GSM. In the telephone number of
the contact, store the normal destination telephone number.
Format of the telephone number: "0123 4567890".
With a private branch exchange, the device is connected to an analog
extension without automatic outside line dialing. If you want to implement
SMS dispatch that starts on the analog connection of the device, then under
"System Settings  SMS-PSTN Options  SMSC Call Number"
program the exchange access code before the actual service center
telephone number.
Format of the telephone number: "0 0123 4567890".
The telephone number of the contact remains in the format "0123 4567890",
that is, without the exchange access code.
41 UK