WIFI-VoIP-PSTN and back
Fiasco:
Thanks again for the help.
Sofhone and an Obi it is then - I'm also in the UK so finding one could be a challenge with only ebay imports looking available.
ianobi:
I would wait a while to see if Amazon.co.uk restock. They are Obihai's main supplier throughout Europe and the OBi110 is popular outside of North America as many use it with a PSTN line.
sdb-:
Before spending too much time and/or money on VoIP using your WiFi distribution, please check the latency and jitter at various points in your house.
WiFi adds a lot of latency, and it sounds like you might have created multiple WiFi links between the nether reaches of your home and the incoming DSL connection.
I'd check with ping at first, and if that works I would try a softphone or two, or at least Skype. (Could use a Localphone SIP account for testing with a softphone.)
Personally I'd be inclined to add DECT repeater(s), but if your existing WiFi solution works well with VoIP and you are OK with the use model as well as setting up and configuring for multiple IP phones then go for it.
Fiasco:
Hmm, latency is a good point.
I've hard wired a Gb/s network infrastructure through the house with commercial grade switches; the wifi coverage is provided through a central wireless router and 2 further wireless access points hanging off the wired network at opposite ends of the house. This gives a good quality and stable 2.5Mhz connection throughout the house with 5Mhz available at the centre.
I can stream HD quality content to a wireless TV without problem so I'm confident about the raw speeds and available bandwidth. But latency is a good point - a ping between wireless devices at opposite ends of the house records gives an average rtt of 90ms - what does good (or bad) look like in terms of VOIP?
sdb-:
90ms is OK. But that is within your house? How much does it add when you ping 8.8.8.8 (google public DNS)?
The other factor is jitter - the difference in timing packet to packet. If the jitter is high you will either hear problems or the equipment will use a larger jitter buffer which adds a delay to your conversation. Ever talk between continents via cable vs satellite? The satellite delay of ca. 1-2s would be like a really bad jitter.
On my wired network in house I typically have sub-1ms latency. My internet connection adds about at least 20-30ms. Right now to 8.8.8.8 I am at 40-45ms. Even my in-house 802.11n is typically less than 5ms. And except for wireless, jitter is minimal in-house.
My obihai is a wired connection:
Code:
--- obi202.internal ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 9001ms
rtt min/avg/max/mdev = 0.477/0.545/0.718/0.079 ms
My roku is via 802.11n (the router is 3x3ac):
Code:
--- roku.internal ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 9014ms
rtt min/avg/max/mdev = 1.383/1.987/3.205/0.634 ms
The jitter is higher than the average latency on the wired connection...
An 802.11g client:
Code:
--- myth1.internal ping statistics ---
10 packets transmitted, 9 received, 10% packet loss, time 9015ms
rtt min/avg/max/mdev = 0.943/4.302/26.425/7.912 ms
I think my roku wifi connection would be great for VoIP. The 802.11g 'myth1' would be likely be OK, but if it really loses 10% of packets you will probably hear it. Both of those generally have no problem streaming video.
Navigation
[0] Message Index
[#] Next page
[*] Previous page