SIP phone error

[Danielf]

We have the following mode: Westell Ultraline Series 3 A90-9100VM60-10

Our problem: our SIP phones will not work properly.  They can connect, and they can dial in and out, however, sound will not work in either direction.  A review of the error logs gives multiple this: 

SIP ALG: Failed parsing. Error code: -1019

We have been working with their support department for the last week +, to no avail.  Any help would be appreciated.

p.s. These phones work perfectly through our firewall on our old cable modem connection, and at the user's homes.  The issue is the fiber connection.

[Bob_Robertson]

Do you know what model of ONT you have installed on the outside of the house?

[packetguy]

Someone else reported this exact error message and found a fix. The thread is here:

http://forums.verizon.com/vrzn/board/message?message.uid=8806

I found this by googling your error message along with "FIOS"