atcomsystems.ca/forum Forums TDM Business Telephone Systems NEC Telephones & Systems NEC SV8300/LLDP MED/DT 700 phones

Hello all,

I am not the phone installer, rather the computer/network support, and find myself in the 'middle' of a situation.

The equipment:
NEC SV8300 (brand new)
NEC DT 700 series phones (about 40, brand new)
Linksys DGS-3620-52P switch

The problem: Phones are not automatically finding the LLDP info, and then are not attaching to the correct VLAN.

You plug the phone in. It flashes LLDP a few times, then DHCP config, then SEP not found. This is because it is using the 'regular' DHCP, and not the correct VLAN one, so it ends up on the wrong subnet.

To get around this problem, we have to pre-config each phone with the correct VLAN info, and then when we do that, all works great.

The phone system supplier is unable/unwilling to assist. "We don't manage your switches".

I am hoping/guessing it is some setting on the switch we need to set. Any helpful insight appreciated. I can provide more specific info/current settings if needed.

Thanks,

TN

If you are seeing the LLDP in the LCD of the set they should be running the correct firmware; does the DLINK support LLDP-MED and is the voice vlan configured properly? If not or the DLink wont work, you could use DHCP scopes on the native VLAN and the voice VLAN to set the voice vlan in the DT700 via NEC vendor specific options. I would bet if you get a decent switch int here that supports LLDP it will work fine.