[top]ITAD Subscriber Numbers

From the ISN Trial Home Page.

ISN provides an easy way for campuses, enterprises, and service providers to acquire globally-unique and globally-routable subscriber numbers to support new communications services. ISNs are free, fast, and forever yours. ISN is also protocol neutral and may be used to support SIP, XMPP, H.323 or other communications.

An ISN is formed by joining a domain-local subscriber number to an ITAD (Internet Telephony Administrative Domain) number, using an asterisk as the delimiter. For example, subscriber 1234 in ITAD 256 would have ISN: 1234*256.

[top]Linksys Dial Plan Changes

The default Linksys dial plan does not support ISN dialing. To add ISN dialing to your Linksys device:

• Navigate to the Linksys device tab with the dial plan you wish to change.
• Add the code below to the dialplan:
  
  Code:

  x.*x.

  Your dialplan would then look something like:
  
  Code:

  (*xx|[3469]11|0|00|[2-9]xxxxxx|1xxx[2-9]xxxxxxS0|x.*x.|xxxxxxxxxxx.)

• Save the configuration and reboot the phone.

The Linksys device will now send the ISN information to its proxy.

[top]Linksys Device Direct Dialing

You can also try direct dialing by adding:

This may or may not work with your device for a few reasons:

• Some devices have a firmware bug and you must press # to get the device to actually dial the direct sip uri.
• The transport method must be set to udp.
• NAT traversal may prevent the freenum.org server from returning the correct SIP INVITE 302 redirect information.