T48G +- 20 second delay outgoing calls

Hi there,

At this moment we are using 7 T48G phones in our company. We have a couple of issues, but the main issue I would like to solve immediately is the delay issue.

General information:
- firmware: 35.7.0.50
- Hardware version 35.1.0.2.1.0.0

What is the scenario:
- Make an outgoing call
- Receiver picks up his phone and doesn't hear anything for the first 15-22 seconds
- Both phones know the call is successful ( timer is counting up )

Kind regards,

Jens Van Herck