When the call drops, the lights on the Telo flash in sequence REW, STOP, PLAY, FFW several times and then VOL, BRIGHTNESS, PAGE several times before the Ooma logo lights up red. I called customer service, but the person on the phone didn't understand English very well and the connection was very poor (ironic, eh?).
I've read through about 1,000 pages of troubleshooting in these forums (including viewtopic.php?t=10023 ) and tried many variations on my network layout but the calls still drop.
Here's how I have it set up now:
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Modem > Router > Telo > Airport Extreme > Wi-fi connected computers > Ethernet switch > Ethernet connected server, printer, etc.
I have the IP address of the Telo set for minimum 3072 kbit/s (384 Kb/s) and maximum 8000 kbit/s (1000 KB/s) upstream bandwidth in the RV042. The Telo is also setup as the DMZ host.
My internet is from Cox and the connection is pretty good:
pingtest.net / speedtest.net results (average over several runs throughout the day)
Packet loss: 0%
Download: 11.82 Mb/s
Upload: 5.05 Mb/s
The VoIP Quality test from whichvoip.com came up all green; Quality of Service is 92%. (Interestingly, the jitter result in the VoIP Quality test was .1ms. I don't understand why the results would be so drastically different between that and pingtest.net; different testing methodology I assume.)
These test results were obtained by connecting through the Ooma LAN port.
Signal To Noise Ratio: 39.6 dB
Power Level: -1.5 dBmV
Power: 51.2 dBmV
The Ooma is currently configured to use a static IP with OpenDNS servers (I have also tried a static DHCP address and my local DNS server). The modem port MAC address is set to "Built in". The modem, router, and Telo have been power cycled several times over the course of my troubleshooting.
I have tried putting the Telo between the router and the switch and that made no difference. I also tried connecting the Telo to the switch. That also made no difference. I have no way to put the Telo between the modem and router (my network topology won't allow it - the wiring closet is on the other side of the house).
As far as I can tell, the network is not the issue. I can be surfing along and see the Telo drop the connection event when no one is on the phone.
I should have plenty of bandwidth available for surfing and Telo. The voice quality is great until the call gets dropped.
The most recent thing that happened was that I plugged my laptop into the LAN port on the Telo to check the configuration on the device and couldn't connect to the Telo's internal HTTP server or to the internet through the Telo. I had to pull the plug and let it reboot.
At this point I'm at my wit's end. Is the Telo broken? It seems to drop the connection when someone breathes on it and that last crash did not inspire any confidence. Any suggestions?