As an alternative,there is new kind of PBX fromNEC which can be added as H323 gateway in thecallmanager and there can be mobile wirelessphones talking to NEC PBX

IPSec group name and password which u define onthe concentrator is nothing but the preshared key.The same IPSec group name and password needs to bedefined in the client for successful authentication. To put in the client configuration go to vpn dia...

Using NAT you can connect two private networks having same addressing.But I am not aware how can u integrate NAT with VPN and get rid ofunique ip addressing

Split tunneling is something different.Suppose aremote user with vpn client has connected to hiscorporate network and at the same time he wantsto browse the internet also,it won't work.Becauseall the packets are forwarded to the corporate network thr...

Assuming u r using 3000 series concentrator at boththe HQ and remote offices.Then its not possible tocreate hub and spoke scenario.From each site youhave to create a link to every other site u requireto communicate. Also if u r using Altiga boxes th...