MJ
here a table with some bandwidth figure for your traffic, as the others
state 150ms is about the max delay after that then you can't guarantee
quality. One major things to look for would be your qos on the local tail,
read up on CBWFQ techniques they should help prioritise your voip traffic
regards
Codec
Voice Bandwidth
Transport Bandwidth
Default
packet size
Packetisation delay
ms
Coding
delay
ms
Complexity (according to Cisco)
Quality
MOS
value
G.711
64 kBit/s
80 kBit/s (with rtp header compression about 65 kbps)
160
20
0.375
Low
Normal
4.1
G.729
8 kBit/s
12 kBit/s (rtp comp.)
24 kBit/s (without rtp comp.)
20
20
35
Medium
Normal
3.92
G.726
16 kBit/s
32 kBit/s (with rtp header compression about 17 kpbs)
40
20
0.375
Medium
Analog
G.726
24 kbit/s
40 kbit/s (with rtp header compression about 25 kbps)
60
20
0.375
Medium
Normal
G.726
32 kBit/s
48 kBit/s (with rtp header compression about 33 kbps)
80
15
0.375
Medium
Normal
3.85
""MJ"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Dear All,
>
> I am planning to implement VoIP between our different office located in
> different country.
>
> All our offices have leased line to Internet normally either of 64K or
128K.
> I have 2x64 Leased lines coming from different ISP's.
>
> Can you suggest me.
> 1. What should be avg. Ping in msec between office to have good VoIP.
> 2. What should be bandwidth to run one channel, they say 8K, so does that
> mean that on 64K leased line I can have 8 Ports working without any
problem
> ?
>
> What are the other things that I should look for before setting up VoIP ?
>
>
> Regards,
>
> Mukul Jain
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