Avaya G150, Руководство по установке и настройке

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Communication Manager Administration for the Avaya G150 Media Gateway
58 Installation and Configuration of the G150 Media Gateway
Note:
Note:
The number of bits of payload per packet depends on the packet size, but is
independent of the sizes of the individual frames contained in that packet. For
example, a packet size of 60 ms could be referring to six 10 ms frames per
packet, or three 20 ms frames per packet, or two 30 ms frames per packet, etc.
Each packet also includes a 464-bit header (regardless of CODEC and packet size) in addition
to its payload.
So, the following is an expression for the overall one-way bandwidth (assuming no silence
suppression):
●
BW = (BW, no overhead) x [(464 + bits payload per packet) / bits payload per packet]
Plugging the number of bits of payload per packet (determined earlier) into this formula yields
the following values for one-way bandwidth (including overhead):
Instructions
1. Type change ip-codec-set <number> and press ENTER to display the screen.
The system displays the IP CODEC Set screen.
Figure 21: IP CODEC Set screen
Table 6: Values for One-way Bandwidth (including Overhead) Per Packet Size
Packet size Bandwidth required (Kbps)
for G.711 Bandwidth required (Kbps)
for G.729
10 ms 110.4 54.4
20 ms 87.2 31.2
30 ms 79.5 23.5
change ip-codec-set 2 Page 1 of 1
IP CODEC Set
CODEC Set:
Audio Silence Frames Packet
CODEC Suppression Per Pkt Size(ms)
1: G.729A n 2 20
2. G.711MU n 3 30