TOPEX BYTTON HSDPA
User’s Manual
pag. 69
Warning, unauthorized voice access is possible!
In case of telephone interface configured as FXO,
unauthorized voice access is possible. If there are no restrictions regarding the access rights of the
extension where BYTTON HSDPA is connected, anyone who calls the mobile number of the BYTTON
HSDPA from a public network will get access to the outgoing lines of the PBX. He will be able to make long
distance calls that will be charged to the owner of the phone exchange.
To avoid this risk you have two possibilities:
1. Either configure the PBX to reject the outgoing calls that are initiated from the extension where
the BYTTON HSDPA interface is connected.
2. Or, if the exchange cannot be configured in that way, then you must set the BYTTON HSDPA
equipment
not
to offer a DISA tone when a mobile phone call coming in. Instead, specify a
“Target Number” instead of providing DISA tone. The PBX will route the call to the operator.
Instead of leaving the “Target Number” on the default “off” value, enter the number of the
operator desk.
Learn Busy Tone
:
This setting refer to the requirement that the Bytton phone port, used as FXO interface, remembers
correctly the “busy” tone of the PBX. Different private phone exchanges may have different “busy” tones,
so you must teach the Bytton HSDPA equipment how to identify a local busy tone.
In order to monitor the busy tone, the interface must be „told” how to identify the busy tone of the
particular phone exchange where it is connected. Here is how you must proceed:
- set the line type as FXO and connect BYTTON to a local extension;
- perform a “Save”;
- make a call to the respective extension, from another local phone of the PBX where the BYTTON
equipment is connected;
- Bytton will answer the call;
- than hang up the extension from where you made the call. This way a busy tone will be generated
towards the extension where the BYTTON device is connected;
- the interface (junction) is released, following a time interval, by the BYTTON equipment. Check if FXO
interface is released after a few seconds and click “Learn Busy Tone”;
- this tells to the BYTTON HSDPA device “this is the correct busy tone”.
If you see the message “Done!”, it is OK, so perform “Save” again.
- If BYTTON does not release the interface, and you see an error message similar to this one:
you should start over again the learning process.
Warning!
It is strongly recommended that you use “Learn Busy Tone”.
Without it, the BYTTON equipment cannot sense when the subscriber that called has hang up, and the
PBX has send “busy” tone. If the called party is a human being using a cell phone, he will hear the busy
tone and should hang up. But if the correspondent is another equipment such as Bytton, it won’t realize
that the call has been ended, and the link will remain on. Consequently, the phone bill will be huge!
To prevent this from happening, you should use the “Busy Tone Detection” option.
