1

Hi all,

i’m having issues with a couple of T26P and Busy Lamp Field.

The BLF are not stable and annyoing me for a couple of weeks now. What I tried with the support guys from the SIP-provider:

  • Changed the MTU to 1452 in the router
  • Went from UDP to TCP and back.
  • Firmware is now v70 (cannot change that due to autoprovisioning from the provider) The provider changed a number in the current flashed fw which makes it impossible to upgrade to vs 71.
  • Different router ( now a Draytek 2860)

The whole idea is that 4 phones should monitor 5 lamps each behind a 30/3VDSL2 line.

Shouldn’t be that exciting I guessed… oh boy I was wrong.

Thanks in advance!

4 Spice ups
2

So by NOT STABLE, do you mean they just cease working after a period of time? All BLFs or just a specific number? All phones? Can you get your hands on a non-modified T26 and test it with v71?

3

I’m sure you saw this, but they did some optimizations for Broadsoft for BLFs. Who knows?

http://www.yealink.com/Upload/T2X/T2X-V71/Yealink%20SIP%20Phone%20Release%20Note%20of%20Version%2071.pdf

So did you provide these phones? Or did the provider? What did they change in the firmware? Can you factory reset it to add v71?

4

By not stable, I mean not showing up at all or giving wrong information about lines being busy.

Yes, i saw that version. The phone is bought from the importer in NL, but autoprovisioned by the provider which gave me a 6.70.188.13 version. The 188 in the number makes it impossible to flash a Yeahlink provided version (info from the importer) and yes, I stubbornly tried it :slight_smile:

5

Sounds like they have you cornered. Do you have SLA’s on your contract with the provider? Cuz this would be a breach.

6

After sending some mails back and forth (including some wireshark traces) i’m now waiting on a reply from the provider.