I was also geeking out with the phone system last night (surprise, surprise). I got the 8×8 DTA 310 working with Asterisk, and crafted a nifty use for distinctive ring. Configuring Asterisk brings me back to the phone-phreaking days of the mid-1980’s (not that I ever participated in such stuff, mind you).
We had to use the fax machine for our house negotiations, so I thought I’d see how to make it work with the new setup. I remembered reading that the fax could work with distinctive ring. I also remembered that Asterisk could send distinctive ring. What I didn’t know is if my terminal adapter supported it.
After some tinkering, I found the setting which made the TA send distinctive ring. There were five cadences I could choose from, so I picked a long-long cadence to start with. I then turned my attention to the fax machine itself. The book pointed me to the proper menu, where I experimented until I found the same long-long ring style. Bingo! The fax automatically picked up whenever that cadence was sent!
This is handy because I constantly get junk faxes to my home office number. For that reason, I often left my fax machine on the manual setting, only turning it on when I was expecting a legitimate fax. Now I can filter out the junk faxes with Asterisk by assigning the fax machine its own “virtual extension” using distinctive ring. I can give legitimate users the proper extension and they can fax me. With a separate extension, I can prevent voicemail from picking up on a fax call, or confusing it with a voice call. This hack is like discovering a separate line on my Sipura terminal adapter. Pretty cool.
I also discovered quite by accident that my Packet8 DTA 310 terminal adapter now works with Asterisk! Seems the upgrade I made to Asterisk 0.9.x was what it took. Curiously, the locked DTA is the one that works: the unlocked one literally locks up when I send a call to it.
After mucking with the DTA 310 for a while, I determined its sound quality is superior to the Sipura, since I hear lots of hiss on the Sipura. I think the hiss is caused by lack of isolation of the power circuits from the audio circuits. It makes it almost unusable.
Now the only thing left to do is re-flash the unlocked DTA into the old firmware. Then I’ll put the right SIP settings into it and re-flash it to the current firmware. That should fix both DTAs and give me a total of four extensions in the house.
I’m such a phone geek!