Jump to content

How to call another SIP phone direct (SIP > SIP)

SFX Group

Recommended Posts



So i have SNOM ONE and a web voip provider (voip.ms), that works, if someone calls me i get the call.


however how do i give someone my extension as a number, i assume its something like 21@xxx.xxx.xxx.xxx or 21@ExternalDomainToIPAddress


1. how will SNOM know to route this? or wont it?

2. do i need a trunk setup to route SIP direct clals?

3. How would i dial direct SIP addresses?

4 (SIDE NOTE) how could i dial names if i used a external plugin like skype (which might not be possible).

Link to comment
Share on other sites

Well the "SIP URI" that the IETF proposed a long time ago did not happen (at least not in the ITSP world). Everything is still pretty much telephone numbers, 10 digits in North America. If you want to use a SIP URI (which is possible with snom ONE), you first of all have to set up your DNS with DNS NAPTR and SRV records (I guess you uderstand why SIP URI did not take off).


There was a attempt called "ENUM" where calls can come from any IP address. This has a lot of security problems, so by default the PBX disables that feature.


I suggest before you start this adventure, use the search-engine-of-your-choice and do some research on ENUM and SIP URI, DNS. You can also include pbxnsip in your search, there are a few texts on ENUM and pbxnsip available from the old days.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...