PSTN Trunk Settings
When you configure a PSTN trunk, you may need to configure some of the advanced settings. This reference describes all the settings on a PSTN trunk.
Basic Settings
Navigation path: Basic tab.
, edit a trunk on theSettings | Description |
---|---|
Name | Give this trunk a name to help you identify it. |
RX Volume | Set the receiving volume of the FXO port. |
TX Volume | Set the transmitting volume of the FXO port. |
Enable SLA | After enabling SLA, users can share this trunk to make outbound calls and receive inbound calls by BLF keys on their phones. In this way, Inbound Route settings and Outbound Route settings for the trunk is invalid. |
Allow Barge | Whether or not other stations are allowed to join a call which is in progress on this trunk by pressing the same line button. |
Hold Access | The hold option specifies hold permissions for this trunk.
|
Failover Destination | Route the call if no one answer this call. |
Hangup Detection Settings
Hangup Detection settings help the PBX to detect if a call is hung up. If you find the PSTN call could not be disconnected, adjust the Hangup Detection settings.
Navigation path: Advanced tab.
, edit a trunk on theSettings | Description |
---|---|
Hangup Detection Method |
Choose the Hangup Detection Type:
|
Busy Count | Specify how many busy tones to wait for before
disconnecting. The default is 4. It is better to set it to 6 or 8. Note: PBX may fail to detect the busy tone if the value of
Busy Count is too
high.
|
Busy Pattern | Set the cadence of your busy signal if Hangup
Detection Method is set to Busy Tone
(Default). In most countries, the cadence of
your busy signal is set to 500ms on and 500ms off.
The format is {Sound},{Silence}. e.g. 500,500 means 500ms on, 500ms off. |
Busy Interval | The busy detection interval. |
Frequency Detection | Used for Frequency Detection (Enable detecting the busy signal frequency or not). |
Busy Frequency | If the Frequency Detection is enabled, you need to specify the local frequency. |
Answer Detect Type Settings
Navigation path: Advanced tab.
, edit a trunk on theSettings | Description |
---|---|
Answer Detection Method | Answer Detection will help the system to accurately bill your
calls.
|
DID Number | If you wish the inbound call through this trunk to be redirected via outbound route, please fill in the destination number to be called. |
Caller ID Settings
Caller ID Settings will help the system to detect Caller ID. If an incoming PSTN call does not display Caller ID, you need to confirm with your service provider if the line has enabled Caller ID feature. If this line does support Caller ID, configure these settings to solve this problem.
Navigation path: Advanced tab.
, edit a trunk on theSettings | Description |
---|---|
Caller ID Detection | Enable/Disable the Caller ID detection. |
Caller ID Start |
This option allows you to define the start of a Caller ID signal.
|
Caller ID Signaling |
This option defines the type of Caller ID signaling to use. It can be set to one of the following:
|
Other Settings
Navigation path: Advanced tab.
, edit a trunk on theSettings | Description |
---|---|
Ring Detect Timeout (ms) | FXO (FXS signalled) devices must have a timeout to determine if there was a hangup before the line was answered. Rang from 1000 to 8000. Default: 8000. |
Echo Cancellation | Enable or disable echo cancellation. |
Release Trunk | Release the trunk, and hang up all the calls on this trunk. |
DNIS DNIS Name |
DNIS (Dialed Number Identification Service) is a telephone service that identifies for the receiver of a call the number that the caller dialed. If you want to use the feature, enable it and fill in the DNIS name. |
Adapt Caller ID
The incoming caller ID that matches the adaptation pattern will be adapted, so that you can press the call record directly on your phone call back a number.
For more information, see Change Inbound Caller ID.
Navigation path: Adapt Caller ID tab.
, edit a trunk on theSettings | Description |
---|---|
Patterns | The following characters have special meanings:
|
Strip | Strip allows you to specify the number of digits that will be stripped from the front of the Caller ID before the call is displayed. For example, if the incoming Caller ID is 05929999999, but you need to dial number 5929999999 to call back, one digit should be stripped. |
Prepend | These digits will be prepended to the Caller ID before the call is displayed. For example, if the incoming caller ID is 5929999999, but you need to dial digit 0 before the number to call back, 0 should be prepended. |