We’re preparing to build our network’s phone with Asterisk .
We have 2 offices: A office ( 20 analog phones) and B office ( 4 analog phones).
Between A and B office will connect by our WAN.
We are considering to build in
- A office:
- Asterisk server
- VOIP gateway FXS 24 ports
- 20 analog phones
- B office
- ATA 4 analog ports
- 4 analog phones
And we are wondering one problem about PSTN interface.
Do we should integrate PSTN interface on VOIP gateway FXS or on Asterisk server?
If we integrate PSTN interface on Asterisk server, we will have to buy another PSTN card?
But it’s not a saving money solution.
If we integrate PSTN interface on VOIP gateway FXS, can we configure to route dial plans to use Asterisk first and after that will go to VOIP gateway FXS. That mean all functions of PBX will be used by Asterisk server. VOIP gateway FXS only has a function of an adapter (convert analog to VOIP).
Which way do we should to choose?
Thanks for your advise.