Hi Andrew thanks for the replies

the ADSL socket has the micro filter built into the faceplate

there is an extension that runs off the socket which runs the fax machine but i'm certain this has got a filter on the end of it too (i will check)

the speed of service we were told by VM is 10Mb, this could have been 20Mb but without a static IP. but due to the need to have a static we had to go for 10Mb.

voice quality is good, but a certain (random) times latency appears.


i haven't looked into BB connections for a while, so just wanted to get a heads up really before the "Specialist" comes in an tries to baffle us with science


just done a speed check on our VM connections an it comes out as

Down 9865 kbps
Up 726 kbps

http://www.speedtest.bbmax.co.uk/results.php?t=13061...

thanks all

I don't believe VM can only offer a static IP on their 10Meg product, but on looking at their site this is only on their 4 and 10Meg business products, somewhat useless.

If you are seeing poor latency and packet loss from a line that looks more than capable of supporting your voip then pester Virgin Media, they may simply point you at their leased line product range

http://www.virginmediabusiness.co.uk/products__solut...

In reply to a post by mudcow007:

voice quality is good, but a certain (random) times latency appears.

My immediate reaction is that general traffic in your office(s) is using the available bandwidth - do you have any sort of proxy or traffic managment in the office?

Frankly, I think your voice "specialist" is trying to sell you something that is probably OTT.

The assumption that the problem is in the central office may not be right. Remember that the effecive bandwidth between sites is the smallest of the two site's upstream figures.

eg, if you use std. ADSL at both ends, you only have (in an ideal world) a 448Kbps channel betwwen sites, before any VPN overhead.

In your office, the VM connection has 726kbps to carry all outbound traffic, including your VOIP. What about the branches?

Do you run email servers at each site or at the central office? Windows AD domain controller at sites or central? Anything else that uploads lots? Any dodgy staff using torrents?

Without knowing your setup, I'd be looking more at,

Local QoS to ensure VOIP gets onto the WAN links first and fastest.
Site to site VPN to carry the VOIP traffic - some ISPs don't like Voip on their network and can do strange things to it.

(Have a look at some of the business-grade Draytek kit for examples of kit that will do this)