3com SuperStack 3 NBX Manuel D’Utilisation
390
A
PPENDIX
D: C
ONNE
X
TIONS
H.323 G
ATEWAY
Processor, Memory, and Bandwidth Requirements
Each G.711 call needs about 50 MHz on a Pentium II or 20 Mhz on a
Pentium III. Each G.723 call needs about 128 MHz on a Pentium II or 75
Mhz on a Pentium III. These speed requirements increase directly with the
number of ports. The IP router bandwidth requirements also increase
directly with the number of ports.
Pentium III. Each G.723 call needs about 128 MHz on a Pentium II or 75
Mhz on a Pentium III. These speed requirements increase directly with the
number of ports. The IP router bandwidth requirements also increase
directly with the number of ports.
The bandwidth requirements for a Pentium II and a Pentium III are
identical.
identical.
shows the speed and bandwidth requirements for different
numbers of ports. It assumes that each packet carries a 50-byte overhead.
The memory requirements to support port processing also increase with
each new port. A fully configured system, with the maximum number of
ports (100), needs 600 MB of main memory. Hard disk requirements are
less than 40 MB.
each new port. A fully configured system, with the maximum number of
ports (100), needs 600 MB of main memory. Hard disk requirements are
less than 40 MB.
Pentium processors can handle.
Table 84 Pentium Processor Capabilities
Pentium II Speed (MHz)
Pentium III Speed (MHz)
Bandwidth (Kbps) on the LAN
Ports
G.711
G.723
G.711
G.723
G.711
G.723
2
100
256
40
150
153.6
38.4
4
200
512
80
300
307.2
76.8
8
400
1000
160
600
614.4
153.6
16
800
2000
320
1200
1228.8
307.2
32
1600
4000
640
2400
2457.6
614.4
64
3200
10000
1280
4800
4915.2
1228.8
100
5000
12800
2000
7500
7680
1920