Mark, it really appears that the alarm panel is not seizing the line. The HT is not getting an off-hook signal. If you have a Butt Set and can connect it at the alarm panel and go off-hook there then your wiring is ok. If you do not have a Butt Set, you can use an RJ11 jack connected to the red and green (or blue/white pair) terminals and then plug your analog phone into the jack. That way you can test from the alarm panel. A nice thing about a Butt Set, is they have a monitor mode where you can listen to what is happing on the line, you can hear the dial tone, hear the dtmf digits and etc. For more info, check the ports on the alarm panel and see how they are labeled, and make sure they connected to the correct ports. I would start with verifying your cable all the way to the panel.
Mark, on the issue of the HT80X’s not showing up in zeroconfig as registered, I did find out that this has been resolved in later firmware releases. I have a UCM6308 with a little older firmware and it does not show the registration as expected in zeroconfig, but I have some GCC’s that are one release old and they do show it. I opened a ticket and their answer was to update the firmware on the UCM. I also found out that the HT80x v2 models do support LLDP so switches can set them to the voice vlan if needed.
OK, I will check the firmware of the UCM but I thought we were on the latest version.
I do not have a butt set but I do have a tester that has clips to clip on the line. Probably won’t help me in this case but that’s the situation. I don’t do this type of work very often at all so buying one…not sure I can justify that. Maybe an eBay special or something.
UPDATE:
I know this will sound too ironic but I just had a message from our alarm guy who said he got on the computer and it shows to be working; he’s seeing that the system did a comms test. So I looked on the CDR of the UCM and, low and behold, I see a few days ago there were several (as in, about 15) dial outs from that HT extension to the monitoring service, all lasting about 25 seconds. So…maybe it’s finally working. I had been watching the CDR for any indication but hadn’t seen any so I stopped looking.
I am 99% sure the keypad on the alarm still shows a comms failure on the display so it may need some sort of reset. He told me to call him and he’d walk me through going into programming to clear it so…anyway…glad it seems to be working again. I don’t know why it wasn’t and now is but…sometimes I guess it’s best to just call it a win and move on.
I’m thinking this situation as far as the HT/Grandstream is solved but I’m not sure exactly what the solution was other than just time.
Glad it’s working for you