Phone adaptor is turning off most of the time

[moscopaul]

Our phone ATA Adaptors are turning off all the time and we cannot use the phone lines.

[Eliot]

hi moscopaul,

what ata brand, model, firmware are you using?

zoom supports a number of different ata including some that are zero touch provisioned.

• Analog gateways
• AudioCodes
• Cisco
• Grandstream
• Upgrade an ATA Grandstream firmware
• Verify an ATA Grandstream unit has the updated Gen 2 device factory certificate installed
• Find an ATA Grandstream LAN MAC address value
• Poly

https://support.zoom.us/hc/en-us/articles/360001299063-Zoom-Phone-Certified-Hardware

thanks,  eliot 

[Boyan]

What I can share is that we've been using Poly obi302 and they work reliably, the ATA has 2 RJ11 jacks so you can feed 2 POTS using one device. What I have observed which may or may not be similar to your use case is that certain type of fax machines and stupid old postage meter machines will always be seen as off-hook and not only that, they'll cause the Poly obi302 to reboot spontaneously just by sitting there. I didn't dig into this, I suspected the internal resistance of these old machines was too low (probably designed for 80s analog crossbar type switches) and triggered the obi to see them as "off-hook" - the solution was to trash these old machines and replace them with modern fax and as for the postage meters - Ethernet connected Pitney Bowes ones.