Hello.

SMB has two offices in the neighbournig buildings.

Each office has internet access and POTS line. We want to build IP-telephony in both offices and between them.

I'm going to install UC520 in each office and use it as Internet-router and IP-telephony gateway with CME.

I have the following question. I need to configure SIP/H.323 trunk between two UC520. Can I set the trunk between two UC520 if:

1) I connect them with leased line on LAN ports?

2) I connect them with IPSec tunnel?

Thanks in advance

Best regards,

   Pavel