Filter
Top Products
10
2.2 Calling From Stations To Remote PSTNs
PBX VoIP gateways that have the FXO interface are able to make phone calls from extensions of the PBX
to remote PSTN users through an IP network. The following example demonstrates how a user on
extension "209" at an office in Shenzhen , can communicate with a user in Taipei with the phone number
"886-2-8691-9470" via a PSTN by picking up his desk phone and dialing "9" plus "00886286919740".
Fig 1 Call From Local Station to Remote PSTN
2.3 Calling From PSTNs to internal Stations
The PBXs are tied as a group, therefore the internal station at this location will have (I). Local station: the
stations collocated with the PBX VoIP gateway that PSTN users dial in to. (II). Remote station: the station
that is on the other PBX VoIP gateway that is connected to the IP network.
To call the local station, the PSTN user can dial the main office number "2322-2222", after hearing the
greeting message, the user would dial "508" so that the phone can connect to extension 508 of the local
PBX. To call the remote station, the local PSTN user can dial the main office number "2322-2222". After
hearing the greeting message, the user would dial "*7209" so that the phone can connect to extension 209
of the remote PBX.