INSTALLATION - CONFIGURATION CALL SERVER : VOICE ON IP
Ed. 0410/20 Réf. 3EH 21000 BSAA
Overflow
When a site A subscriber calls a site B station by its internal number, ARS routing enables the calls to
be re-routed to the public network when it is no longer possible to call via the VoIP accesses. The fol-
lowing criteria render a "VoIP access" trunk group inaccessible:
- the VoIP CoCPU board of site A is out of service.
- no more DSPs associated with the VoIP accesses are available.
- the remote H.323 gateway is out of service (VoIP CoCPU board of site B out of service).
- the quality of service (QoS) to the remote gateway is poor (exceeding of the possible simultaneous
communication threshold for the bandwidth reserved for Voice over IP for this remote H.323 ga-
teway).
ARS table of site A:
Calling the site B station by its internal number:
Calling the site B station using its public number:
*: As the public numbers 04723542 50 to 99 do not belong to site B, they must be routed to the public
network.
Break In
The break-in service enables the PBX to re-route a public number from site A to site B. In our example,
the public network subscriber dials the number 03 88 67 71 50 which is routed to station 250 on site B:
Public numbering plan (site A):
ARS table:
Networ
k
Prefix Ranges Substitute List. Tru-
nk group
list
Called/HH User Comment Destination
Priv. 2 00-49 2 4 Het H.323 to site B Gateway
04723542 1 Het ISDN Access No IP
Networ
k
Prefix Ranges Substitute List. Tru-
nk group
list
Called/HH User Com-
ment
Destination
Pub. 0472354
2
00-49 2 4 Het H.323 to site
B
Gateway
04723542 1 Het ISDN Access No IP
Pub. 0472354
2
50-99 04723542 1 Het ISDN Access No IP *
Function Start End Base NMT Priv
Secondary trunk
group
7150 7150 ARS Keep No
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