OK this is rather strange.

Last night I setup my new Linksys SPA941 and was working perfect.

I tried it today and the call quality is very poor and stuttery, You cant understand who says what. I even tried the talking clock and voicemail with the same problems.

I cant understand how it went from working perfect to really bad over night?

My setup is as follows:

- O2 Wireless Box II Router
- Linksys SPA941 (Plugged directly into Router)
- O2 8mb Connection

I have done a speed test and the results are as follows:

Download Speed: 6912 kbps (864 KB/sec transfer rate)
Upload Speed: 371 kbps (46.4 KB/sec transfer rate)
Latency: 27 ms

I have tried a few things including:

Port Forwarding:
5060-5082 <--- TCP/UDP
8000-20000 <--- TCP/UDP

Disabling Firewall on Router
Totally switched off.

Closing all programs on the computer which use the internet
Outlook, MSN etc.


Is there a problem voipfone's end or do you think its my end? I just don't understand how it was working last night and now its really poor quality.

Can anyone assist?

Also did a voip simulation test on a website I found and got the following results:

Upstream jitter: 0.1 ms
Downstream jitter: - ms
Upstream packet loss: 0.0 %
Downstream packet loss: - %
Upstream packet order: 100.0 %
Downstream packet order: - %
Packet discards: 0.0 %
MOS: 4.1

Email us at support at voipfone co uk using your registered email address and we'll have a look for you.

Email Sent.

Many Thanks