DIMENSIONING - LIMITS CALL SERVER : VOICE ON IP
Ed. 042/8 Réf. 3EH 21000 BSAA
The number of DSP channels (VoIP ports) required depends on the system configuration and the VoIP
services to be implemented.
The main situations are as follows:
- H.323 gateway only
The number of DSP channels is equal to the number of IP network accesses required, in accordance
with the IP trunk abacus above.
Nota : The desired number of DSP channels can be limited by the bandwidth reserved for VoIP ac-
cesses. E.g. if the reserved bandwidth is 64 Kbps, only 2 calls can be made simultaneously;
the number of VoIP accesses can thus be limited to 2 channels.
In the case of PC-to-PC or IP Phone-to-PC communications using H323 PCs, the number of
IP trunks is as defined by the abacus + 30 % of the number of PCs; for instance, you need
to add 6 IP trunks in order to use 20 NetMeeting PCs.
- IP Telephony only
The number of DSP channels needed is indicated in the following paragraph.
- Conventional telephony (UA / DECT / Z, etc.) and IP Telephony
The number of DSP channels needed is indicated in the following paragraph.
- H.323 gateway and IP Telephony
The number of DSP channels needed is indicated in the following paragraph.
The number of DSP channels equals the desired number of IP network accesses.
Number of
IP Trunks
55 60 65 70 75 80 85 90 95 100
Number of DSPs
(A)
51 55 59 62 66 69 73 76 80 83
Number of
IP Trunks
105 110 115 120
Number of DSPs
(A)
87 90 93 96
To Next Page
Loading...
Need help?
General