Multi-Tech Systems MVPFXS-16 - Manual (Page 93)

MultiVOIP FXS User Guide Phone Book Configuration
93
Phonebook Examples
The following example demonstrates how Outbound and Inbound PhoneBook entries work in a situation
of multiple area codes (as in the Minneapolis metro area). This example also illustrates that MVPFXS voips
allow remote callers access only to specific phone stations connected to the MVPFXS voip and do not allow
remote callers access to the local PSTN in which the MVPFXS unit is located. Consider a company with
offices in Minneapolis and Baltimore. The system depicted is SIP-only. In the Minneapolis office, an
MVPFX2-8 unit is used and it affords both FXS and FXO interfaces. By contrast, in the Baltimore office, an
MVPFXS-24 voip is used adn it offers the FXS interface only.
2 Site Example
Notice first the area code situation in those two cities: Minneapolis’s local calling area consists of multiple
adjacent area codes; Baltimore’s local calling area consists of a base area code plus an overlay area code area
code 443), but, since the voip used in Baltimore is FXS-only, it does not offer access to the local PSTN. That
is, Minneapolis voip callers can call phone stations in the Baltimore office only; they cannot call into the 410
or 443 area codes using the voip system.
Mpls
612
NW
Suburbs
763
St. Paul
& Suburbs
651
SW Suburbs
952
5
Company
VOIP/PBX
Site
5
Baltimore
410
Company Office
has MVPFXS-24 VOIP
with FXS Terminal Block
...