Hardware manual

SIP virtual ports

3.6

Codecs

Supported – In this field you can find list of supported codecs. You can't find here codecs which were

selected as used.

Selected – In this field you can find list of codecs, which are used for communication on this virtual

port. Within context menu is another option for setting features of selected codec.

DTMF according to RFC2833 – With this option you can enable transmission of DTMF according to

RFC2833.

Fax T.38 – With this option you can enable fax transmission according to recommendation T.38. If

this option is checked, it is changed to link with advanced settings. Recommended setting is TCF –

Transfer, Error correction – Redundancy and No compression.

Figure 2 View of configuration part for setting codecs.

3.6.2 SIP Proxy

SIP proxy virtual port is used for connecting SIP terminals to the PbX. All parameters are divided into

logical sections.

Stack status

This field displays information about stack and its actual state.

Basic parameters

Port – Here you have to fill in number of used UDP or TCP port (it depends on following setting) for

communication with opponent.

Transport layer – It defines transport layer of this interface. You can choose between TCP and

TCP&UDP. If you use both, higher priority has UDP, but for packets longer then 1300 bytes will be

used TCP protocol.

Realm – It defines own address used within header From.

Via header – It defines content of Via header. You can choose between following options:

IP address – Via header is filled with CPU IP address.

FQDM – Via header is filled with PbX hostname, which was entered on the IP interface of the PbX.

NAT – In this case is filled static IP address of NAT. NAT has to be configured correctly, else

signalization from opponent can't reach your PbX.

STUN – Here you can enter address and port of STUN server, used for discovering actual address

behind NAT.

Authorization required – With this option you can enable authorization for all terminals. For

authorization are used logins and passwords from user logins, according to stations which are