Installation guide

Bizfon Manual II: Administrator's Guide Administrator's Menus
Bizfon4000 (SW Version 3.1.x) 38
1. Enter the desired Auto Attendant Settings page.
2. Select Edit Authorized Phones Database to enter the Authorized Phones Database page.
3. To remove an authorized phone(s), select one or more checkboxes of the corresponding records that ought to be deleted from the Authorized
Phones Database table. Press Select all if all records ought to be deleted.
4. Press the Delete button on the Authorized Phones Database page.
5. Confirm the deletion with Yes or cancel with No.
Extension Codecs
To establish IP voice communication, both partners have to use the same codec. During establishing the communication line, this codec is
negotiated. If the caller does not find a fitting codec, the communication cannot take place. So, if you want to be reachable by preferably all IP calls, it
is helpful to support as many codecs as possible. In this case, all the codecs that Bizfon offers should be added to the Active Codecs table. On the
other hand, some codecs require a high transfer rate - up to 64 kbit/s. If you are certain you do not want to use these codecs, you have to make sure
they are not listed in the table Active Codecs.
The Extension Codecs page displays a list of Active
Codecs and the state of the Out of Band DTMF and FAX
Support features for Bizfon extensions (also Auto
Attendant).
Please Note: Use caution when configuring Auto Attendant
Codecs as they are used by virtual extensions for
redirecting the incoming calls.
The table Active Codecs lists active voice codecs for the
selected line that are supported by Bizfon. The order of
records in the Active Codecs table is important for
transmitting and receiving. A codec placed at the top of the
table will be used as the preferred codec. If the remote
party does not support the preferred codec, the following
codecs will be tried out in a top-down order in the Active
Codecs table.
Each record in the table has an assigned checkbox. It is
used to select the record to be deleted or moved up or
down.
An error occurs if no records are selected and the user
activates the delete button: “No records selected”. At least
one codec must be attached to the line. When attempting
to delete the last codec, this error will occur: “At least one
codec should stay in the codec list”.
Fig. II-67: Extension Codecs list
Add opens the Add Entry page where the user may add
codecs supported by Bizfon. The voice codec defines the
voice compression algorithm for the incoming and outgoing
DSP packages.
Codecs lists all codecs supported by Bizfon. If no more
codecs are available (all available codecs have already
been transferred to the Active Codecs table), the Add
Entry page will display the message “No Available Codecs”
instead of the drop down menu.
Fig. II-68: Extension Codecs - Add Codec page
The Move Up/Move Down buttons are used to move the selected codec one level up/down in the table.
The Out of Band DTMF Transport checkbox enables DTMF code transmission in parallel with the voice stream. The destination receiving the
DTMF code will play it locally if it supports the feature. This is helpful to avoid DTMF’s loss upon bad traffic. This feature is valuable for all codecs but
it is especially recommended to enable it in case low bit rate codecs (G729, G723, G726/16, etc.) are selected.
Enable T.38 FAX checkbox enables the FAX tone detection and the T.38 codec support for the FAX transmission from/to the Fax Machine/Fax
modem attached to the line. Enable Pass Through FAX checkbox enables the FAX tone detection and the G711 codec support for the FAX
transmission from/to the Fax Machine/Fax modem attached to the line.
If both of these checkboxes are enabled, T.38 codec will be used as preferred codec for FAX transmit/receive and if not acceptable by the peer,
G711 codec will be used instead.
Please Note: If both of these checkboxes are disabled, no FAX transmission to the peer’s voice mailbox will be possible. Checkboxes are applicable
for FAX transmission/receipt over IP network only.
Enable Pass Through Modem checkbox enables the modem tone detection and the G711 codec support for the data transmission from/to the
modem attached to the line. During data transmission, Silence Suppression (see
RTP Settings) and Echo Cancellation are being disabled on the
line.
Force Self Codecs Preference for Inbound Calls checkbox enables the usage of the own preferred codecs (if available on both peers) for the IP
connection establishment on the extension.