help Configuration Planner › Creating a configuration package › Define Trunks
Define Trunks
“Trunk” denotes a connection to another network, e. g. the public telephone network.
To define a Trunk  
1 In the menu select “Trunks”.
*The “Trunks” list will appear.
2 Click on the “Add Trunk” button.
*The “General” tab appears.
Label
Explanation
Trunk Group
Select a defined Trunk Group to which the new Trunk should be assigned.
Name
Enter the name of the Trunk. The name must be unambiguous within SwyxWare.
Description
Enter a brief description.
Trunk is enabled
Activate the check box to activate the trunk immediately after the installation, i. e. make it available for telephone calls.
3 Select the “Codecs” tab.
* 
With the help of the codec filter, you can define how voice is compressed for transmission. Specify globally here for the SwyxServer whether codecs should be filtered, and if so, which codecs should be permitted.
Label
Explanation
G.711a
Voice, high bandwidth (around 64 kbit/s per call). The voice data is slightly compressed.
G.711µ
G.722
Voice, high bandwidth (around 64 kbit/s per call). The voice data is transmitted in HD audio quality.
G.729
Voice, low bandwidth (around 24 kbit/s per call). The voice data is heavily compressed.
T.38
Fax over IP (T.38, around 20 kbit/s per call). In this case, the special fax protocol T.38 is used, which takes the set-up of the IP network into consideration.
Do not filter codecs
When “Do not filter codecs” is selected, all media data, regardless of the codec, is transferred without change to the destination (transparent mode). This setting allows Codecs unknown to SwyxServer to be used, e. g. Video.
Prefer quality
Activate the check box to set the codec priority in the following order: G.722, G.711a, G.711µ, G.729 or Fax or IP.
Prohibit T.38 reinvite by sender
Activate the check box to block switching to T.38 by the sending fax device.
The receiving fax device switches to T.38 after detecting the fax tone (CED tone, 2100Hz). Alternatively, the switch to T.38 can be carried out by the sending fax device.
Some IP adapters don't support switching by the sender.
Remove T.38 codec from initial invite
Activate the check box to remove T.38 from the initial connection request.
Some IP adapters cannot correctly interpret an initial connection request which includes T.38 as well as voice Codecs.
The fax devices first set up a voice connection and then switch to the fax protocol T.38 because of the fax tone (CED tone, 2100 Hz).
4 Select the “Channels” tab.
Label
Explanation
Number of simultaneous calls
Specify how many channels (connections) should be simultaneously routed over this trunk.
The maximum number of channels is calculated from the available bandwidth and the Codec settings.
Maximum number of simultaneous outgoing calls
You can also determine how many outgoing and/or ingoing connections are established at most.
Maximum number of simultaneous incoming calls
5 Select the “SIP Registration” tab.
* 
Enter the parameters the SIP gateway needs to long onto SwyxServer via this trunk.
Label
Explanation
SIP User ID
Enter the SIP User ID.
SIP User Name
Enter the SIP User Name.
SIP Password
Enter the password.
SIP Authentication Mode
Indicate whether or not the gateway needs to authenticate itself.
6 Click on the button to save the settings.
*The new Trunk will appear in the list.
Last modified date: 07/17/2019