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8.3 Case II: T
This case describes the typical settings of a two-site configuration; say C
B-HQ and its branch B-BR located in another country. Assume each site has a DSL connection for
Internet access. B-HQ has 4 PSTN subscriber line
provisioning tasks include:
․
Both sites have staff phones in cubes and of
․
Each phone has one extension. A utility phones can call extensions within the site it is in only,
while the staff phones can call any extension in both sites without limitation. B-HQ has
extensions 1XX and B-BR has extensions 2XX.
․
Calls between B-HQ and B-BR u
static IP address, 64.1.0.1 and IP PBX at B-BR has a static IP address, 222.44.0.1.
․
Only staff phones can call out to PSTN with a prefix 9.
․
B-HQ staff phones call out starting with 90118621 will relay to B-BR through the SIP trunk and
then hop off to PSTN in B-BR. Similarly, B-BR staff p
relay to B-HQ for PSTN hop-off.
․
Incoming PSTN calls are answered by auto attendant and could be tra
wo
-sit
e config
se private SIP trunks across Internet. IP PBX at B-HQ has a
uration
s and B-BR has 2 lines as shown in Figure 6-2
fice
s and utility phones in pu
hones call out starting with 9001408 will
96
ompany B headquarters
blic areas.
nsferred to any extension.
. The
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