Is it any good to have 1 QoS router on WAN with VOIP

35 pts.
Tags:
QoS
Routers
VoIP
VoIP QoS
WAN
I am thinking of implementing VOIP on a network that links 2 sites via DSL and Linksys BEFVP41 routers which do not support QoS. I am wondering whether it would make any sense changing one of these routers with a RVS4000 to ensure good voice quality. I would like to avoid purchasing 2 new routers if it's possible to purchase onle 1. Thanks.
ASKED: April 3, 2008  3:33 PM
UPDATED: April 7, 2008  7:42 PM

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There is much more to consider then just QoS. You need to consider your internet speed the phone system you will use, how will you prioritize the voice or data. Having a router at one end with QoS does nothing for the other end. Also, that does not mean your ISP will ensure QoS. If this is for a business, then you should consider talking with a local expert in VOIP.

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  • Tbitner
    Are you trying to run VoIP between two networks that are separated by a IPSec VPN? An IPSec VPN is subject to latency/jitter/loss since it traverses through the public Internet. You won't be able to maintain QoS priority on this traffic even with QoS enabled endpoint routers. You would need a dedicated line connection between the offices such as MPLS, then your QoS headers will be honored and maintained.
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  • EB
    I am thinking of running VoIP between 2 networks that are separated by an IPSec VPN over a 256 kbps public Internet connection. I have a Samaung OS7200 at a small business which I'm hoping to upgrade for that purpose. There will be 2 IP phones at the remote end. I don't know that the ISP ensures QoS on that particulay connection, however, they offer VoIP (vonage type) service to their customers. But would I definately need a router with QoS at both ends?
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  • Tbitner
    VoIP will work for both networks if they are independent (such as vonage or from ISP), but if you want to tie them together, it adds a whole other level of infrastucture (dedicated connection, VoIP gateway, Call Manager...etc) which means $$$. VoIP over the public Internet for two networks isn't going to work. Public Internet routers don't honor QoS tags, plus your packets will be encrypted anyway. If you go with VoIP provided by the ISP at both locations, they might provide equipment so you wouldn't need to upgrade your router, but It really depends on how they implement it. Talk to the ISP and see what they recommend for their solution. Regards
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