Extensions¶
Extensions define the information needed for an endpoint such as a hard phone, soft phone or some other device to connect to the SIP server. The extension is the SIP username and the password is the secret used for authentication. The domain name servers (DNS) to purposes it, locates the server to register to and is the realm that determines which domain the endpoint is registering to.

Basic Settings¶
- Extension
- Enter the alphanumeric extension. The default configuration allows 2 - 7 digit extensions.
- Number Alias
- If the extension is numeric then number alias is optional. The primary purpose of this field is when the extension is not a number then the number alias is required. Note a numeric extension and number alias does not currently work.
- Range
- Enter the number of extensions to create. Increments each extension by 1.
- Voicemail Password
- Enter the numeric voicemail password here.
- Account Code
- Used with billing systems if you don’t have a billing system then its optional.
- Effective caller ID Name
- Internal Caller ID name
- Effective Caller ID Number
- Internal caller ID number usually set to the extension number.
- Outbound Caller ID Name
- Used by the outbound route for external caller ID name. Business or Organization typically is set here.
- Outbound Caller ID Number
- Used by the outbound route for external caller ID number here. Business or Organization number goes here.
- Emergency Caller ID Name
- This is used when calling out to an emergency service like 911.
- Emergency Caller ID Number
- This is used when calling out to an emergency service like 911.
- Directory Full Name
- The first and last name used in the directory. You can call that directory with *411
- Directory Visible
- Select whether to hide the name from the directory.
- Directory Extension Visible
- Select whether announce the extension when calling the directory.
- Limit Max
- Set max number of outgoing calls for this user.
- Limit Destination
- Set the destination to send the calls when the max number of outgoing calls has been reached.
- Voicemail Enabled
- Enable or disable voicemail for this extension.
- Voicemail Mail To
- The email address for sending voicemail to email.
- Voicemail File
- Select whether to send the voicemail as an attachment or as a link in the email.
- Voicemail Keep Local
- Choose whether to keep the voicemail in the system after sending the email notification.
- Missed Call
- Set the missed call to true and set the email address if you want to receive an email for missed calls that were routed through the dialplan to and was not answered by the extension.
- Toll Allow
- Enter the toll allow value here. (Examples: domestic,international,local) This can be set to any name you want it sets a variable that can be a condition on the outbound routes.
- Call Timeout
- Set the timeout for the call ringing.
- Call Group
- You can define any call group you want the following groups are examples: sales, support, billing. These are used for group intercept or calls can be sent to the call group.
- Call Screen
- If set will ask the caller to identify themselves. Their response will be recorded and offered to the person receiving the call.
- Record
- Whether to record local, inbound, outbound, or all calls that were sent directly to this extension.
- Hold Music
- Select music or ring tones that will be used for music on hold for this extension.
- Context
- The context is set by default to match the domain name or IP addres. It is usually correct by default and doesn’t need to be changed in most cases.
- Enabled
- Extension enabled or disabled.
- Description
- A description for the extension.
Advanced Settings¶
Advanced settings in extensions. Be sure to know what and why you are changing these settings or you will risk causing issues for the extention.

- Auth ACL
- Advanced auth acl uses.
- CIDR
- Advanced cidr uses.
- SIP Force Contact
- Choose whether to rewrite the contact port, or rewrite both the contact IP and port.
- SIP Force Expires
- To prevent stale registrations SIP Force expires can override the client expire.
- MWI Account
- MWI Account with user@domain of the voicemail to monitor.
- SIP Bypass Media
- Choose whether to send the media stream point to point or in transparent proxy mode.
- Absolute Codec String
- Absolute Codec String for the extension.
- Force ping
- Use OPTIONS to detect if extension is reacheable.
- Domain
- The domain the extension is currently saved on.
- Dial String
- Location of the endpoint.