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VoIP & QoS

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lobo66

IS-IT--Management
Nov 12, 2002
106
US
Question may be a bit broad but just a general opinion on what most of you if any are using for a QoS scheme with VoIP ..

Thx ...
 
The only QoS on my network is on the wireless side. You have to have it.


It is what it is!!
__________________________________
A+, Net+, I-Net+, Certified Web Master, MCP, MCSA, MCSE, CCNA, CCDA, and few others (I got bored one day)
 
QOS is absolutely necessary in a mixed environment - LLQ is what I use commonly in a Cisco network.
 
Yes and no.

If you are running your voice and data on the same VLAN (bad) then yes, you will have to enable QoS to ensure that voice packets get priority.

However,

If you are running your voice on a seperate VLAN (good), then you probably don't have to worry about QoS until your packets hit a router. If it is staying in a switched environment, you should be golden.

Most SMB installations don't need much QoS enabled, unless they ar trying to use 802.11b phones. Most Cisco switches can handle the extra VLAN traffic without issue.


It is what it is!!
__________________________________
A+, Net+, I-Net+, Certified Web Master, MCP, MCSA, MCSE, CCNA, CCDA, and few others (I got bored one day)
 
I was on a call where the calling party is using VoIP and the terminating party (me) was not. The originator could here me fine, but his voice sounded to me like he was talking while vibrating his lips with his finger. Does anyone have any idea what may be causing this?
 
his transmission path was congested? His upload speed is much lower than his download(if on residential broadband)?
 
Sounds like you need to use a different Codec. If your user is using a broadband connection, there isn't a whole lot you can do about thier upload speed. But you can give them general guidelines.

1) Don't download stuff while making a call.
2) Turn off thier kids computers during "working hours". Most kids run all kinds of Kazaa like P2P and other brandwidth hogging applicatins. They typically have spyware also.
3) Make sure that anti-spyware and anti-virus software is installed and up to date.
4) If using Outlook with Exchange, I always tell my users not to open or close outlook while on a call. It tends to use a lot of bandwidth during these processes.

Personally, I am working from home today using a Cable Modem. I use a G711 codec and an SSL VPN client. I use a softphone and things are great. I have tried using VoIP on a 768K/128K DSL and found the performance to be dismall. I hate supporting users on DSL (for the most part) unless they have speeds in excess of 3Mbs.


It is what it is!!
__________________________________
A+, Net+, I-Net+, Certified Web Master, MCP, MCSA, MCSE, CCNA, CCDA, and few others (I got bored one day)
 
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