I am installing a vpn with spa3102; however i only get one way audio from remote site.

Hi, ap. Just a couple of things....
What system? What cardage? What phone?

More input, please.

......and welcome to the BB.

system is an ecs 5.1 with mbu 1.19.

Sorry, you will need to either contact a Mod of this forum or wait till someone with that level of assistance comes by.

Good luck.

How is the audio if the SPA is installed local to the ECS?

yes the spa3102 workes local on the ecs audio 2 way

Does your remote site have the same software versions as your main site, especially for the MBU?

no the remote site has a vpn router a spa 3102 and a single line phone. The vpn is up but only audio from remote to the home site. No audio for home can be heard at remote.

Have you opened any ports on the remote router?

Check in 01.08 for the logical port and check settings for VPN. Confirm both site have the TCP/UDP ports opened.

Also confirm you have the license installed in the ECS

You may want to also upgrade MBU version to 1.20 (shouldn't be a factor, but can't hurt)

yes all license are installed and voip is set for vpn I am still getting one way audio on the sip and voip phone from remote site ports 50002 open on remote for ip of voip phone

What internet provider is at both sites, and router make/models. Are you following an engineering doc on the 3102 install?

att on remote charter at home netgeat prosafe vpn firewall (FVS114)on both sides

yes EBA-2008-12 set up spa3102 for sip slt and ecs for sip station

Try taking a look at UDP ports and be remembered they are always happen in pairs. Say ports 5060 & 5061 or 5080 & 5081

Do you have an IP phone to try?

Set port forwarding UDP 50002 to the IP address of the phone in the router