I'll be trying a alarm system test in the days ahead (it is a holiday today) with its line connected to Ooma (still have the copper service active), but think I've already run into the first problem. My alarm system currently dials-out in pulse ("rotary") rather than touch-tone (DTMF).
I just tried changing my voice handset to pulse-dialing, and a couple of voice test-dials with Ooma didn't work (TT does). In a search of this board a post said pulse is not supported by Ooma, but an old result found via Google said Ooma does. Which is currently correct?
Switch your alarm panel to tone dialing and Contact ID reporting format.
The alarm center will have to be involved because the format change will probably require a different phone number to call to reach the correct receiver.
If the alarm panel is already using contact ID then switching to tone dialing is all you need to do in the panel.
The Telo will also need to be put in alarm mode in your Ooma online account.
I kept a land line for my alarm system because the line is underground and no one but me, and maybe the phone company, knows where it is.
Telo with 2 Handsets, a Linx, and a Safety Phone
Telo2 with 2 Handsets and a Linx
I'm not seeing SIA or Contact ID (=CID) in my lengthy installers-manual, so my mid-1990s system may be from before both standards? It will be interesting to see if the panel works, or, if not, if my monitoring company's tech-support can make it do so.
I am reading on-here about 2017 issues with Ooma, and advice that adding *99 and a delay to the dialing may be needed -- I don't know if my panel can do the latter.
I should find out later today, when, weather-permitting, I switch the copper lines from POTS to Ooma (except for one phone until I get the number transferred). Then will test-alarm it again.
FYI -- I contacted the manufacturer of the alarm system via their public tech-support website, and asked if my system was CID or SIA. Their person, seemingly in India, etc., refused to answer, and told me to go to the installer. I told him I'll be sure to tell my hundreds of specifier-friends of Johnson Controls most-excellent customer support.
Next is to transfer our original phone number.