voicemail and old pbx

Joined: Wed 09 of Apr, 2014

voicemail and old pbx

Posted:Wed 09 of Apr, 2014 (18:58 UTC)
Old Voicemail4000 box is connected to the Toshiba Strata DK 280, and is going to be replaced with FreePBX box.
The new asterisk box has 4 ports FXO PCIe Card TDM410-40 installed.
Between strata and freePbx are 4 rj11 analog lines.

PSTN----Strata PBX---freePBX

Outside call from PSTN is answered by strata, is switched to the asterisk, and greeting message is played.
Now I can switch the incoming call to the voip extension on freePBX.
But how to switch the call back to the strataPBX in order to enter strataPBX user extension?
How to make Strata answering request to switch extension?
I tried
1.) Extension number that is built into the DAHDI channel module *72andext, but it does not do anything.
2.) inbound route catching any call, switch incoming call to configured outbound connection back to the strata pbx and enter extension
No luck....

What should I configure to enable outside caller to be switched out of the freepbx voicemail, and enter strata pbx extension?
What is the right way to do it?
Thanks in advance for any help.