INSTALLATION - CONFIGURATION CALL SERVER : VOICE ON IP
Ed. 044/20 Réf. 3EH 21000 BSAA
CONFIGURING THE INTEGRATED H.323 GATEWAY
H.323 Gateway:this application layer forms the interface between the IP telephony (H.323 stack) and
switched telephony worlds (Alcatel OmniPCX Office PBX call manager).
Configuring the PBX as the H.323 gateway
After an initialization by default all the DSPs are assigned to the pool of VoIP subscriber channels (IP
telephony).
In a pure H.323 gateway configuration, all the DSPs of the PBX VoIP daughter boards will be used for
"IP network" accesses.
Number of VoIP access channels (IP trunks):Number of channels for VoIP access, i.e. 1 DSP chan-
nel for 1 "network access" (generally for small configurations; see also the abacus in the "Dimensioning
- Limits" section).
Quality of service: selection of the type of QoS used for the remote H.323 gateway VoIP calls.
If all the network equipment items support the IP ToS, one can choose an IP priority from 1 to 7:
If all the network equipment items are "DiffServ" compatible, one can choose from:
- DiffServ PHB Best Effort Forwarding (BE) (priority bits: 00000000),
- DiffServ PHB Expedited Forwarding (EF) (priority bits: 10111000).
Nota : Each DSP placed in the "VoIP access" pool is considered as a "network access" by the PBX,
i.e. 1 VoIP DSP = 1 B-channel. As there can be a maximum of 6 VoIP daughter boards,
each with 16 DSPs, there can be no more than 96 VoIP access DSPs.
Network accesses (T0, T2, analog TL, DLT2, analog ATL) + VoIP Accesses ≤ 120
Configuring the gatekeeper (optional)
- Integrated gatekeeper: if the H.323 gateway is in Stand-alone configuration, the gatekeeper is
integrated into the PBX; check the box.
- IP Address: if the PBX is a gateway in an H.323 zone, one must use an external gatekeeper that
is the manager of the H.323 zone it covers, indicating its IP Address provided by the network ad-
ministrator.
- Reset Code: allows the resetting of a password on NetMeeting PCs that have a safety Plug-in.
- by MMC-PM5 (Expert View): System Miscellaneous -> VoIP -> Parameters -> General tab
- by MMC-PM5 (Expert View): System Miscellaneous -> VoIP -> Parameters -> Gatekeeper
tab
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