[Asterisk-Users] VoIP over 1xRTT

Tue Oct 19 05:20:04 MST 2004

For the SIP client. I just can't imagine using a SIP client over a
connection that has 250+ ms response times. If I make it go online to the
802.11 networks, I can use the SIP Client with ULaw and get high quality SIP
calls at any hotspot. I wouldn't do this for every hot spot, but it'd be a
nice feature to have for when I'm in other countries, or I'm in an area
where Verizon has no coverage or their reception is terrible. Maybe even a
supplement for when I'm running low on minutes. 

When I'm at home, could use it like a Cordless phone. Work off my house
line, which is tied in through my Asterisk server. To be honest, it's just a
kewl feature and a neat thing to do with the phone, what can I say, I'm a
geek like that, hehe.  The Verizon plan is coming from my work, so I don't
want to put TOO many personal calls on it. 

Even with the EVD Network (2nd stage rollout), the ping responses are going
to be 250+ ms. Also, I don't think these phones support 2nd stage, only
Stage 1, 1xRTT. I'd have to get a new phone or something.

As far as the laptop, there are times when I can do things easier from my
laptop. Full sized keyboard, access to all my documents, etc. Right now I'm
used to plugging my laptop into my Sprint phone. So whenever I want to do
SSH or email, I have to use the laptop. Not used to having a PDA, nor one
that can go online on the click of a button. You're probably right, with the
PDA features, me needing to make my laptop go online through the phone will
probably be 5-10% of what it used to be. 

Which codec should be used for 250ms response times? G729A? 

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Joe Dennick
Sent: Tuesday, October 19, 2004 7:14 AM
To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
Subject: RE: [Asterisk-Users] VoIP over 1xRTT

I also have a Samsung i700 phone, and their newer i600 (Mobile Windows
2003), both through Verizon.  With both phones you can purchase
unlimited Internet access for $79 per month.  Both phones are able to
browse the Internet, send and receive email, and use the roll-up
keyboard.  As such, I'm having a tough time understanding why you would
want to use wireless (802.11?) to connect these things to your local
network when the freedom comes from being able to use the build-in
Internet Access.  Verizon plans to have their EVD Network throughout the
US by the end of 2005 (it's currently only in Washington DC and San
Diego.

I cannot understand why you would want to try to get your laptop to go
online through the phone or vice-versa, the phones can do just about
everything you would want to do online, so why bother trying to connect
a laptop?  Many of our company's traveling executives travel with the
i700 in order to keep up with email.  This keeps them from having to lug
their laptops around and search out an Internet connection for them.

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Deon
Rodden
Sent: Monday, October 18, 2004 5:25 PM
To: brian at bmit.net; 'Asterisk Users Mailing List - Non-Commercial
Discussion'
Subject: RE: [Asterisk-Users] VoIP over 1xRTT

My concern is Sprint would consider this a threat to their "Bread and
Butter". Why buy one of their $100/mo plans for 2000 Anytime Minutes
when you can get a $50/mo data plan and use an unlimited VOIP carrier.
Why pay their overpriced International rates, when you can just go
through a VOIP carrier.

With Verizon, I'm getting the Samsung i700 PDA phone. It runs Windows
Mobile 2003, which is based off CE. I believe I found a SIP client for
it. Using a wireless SD card in the SDIO slot it comes with, anytime I'm
in range of a hotspot, I'll be able to go online and use the SIP client.
Effectively turning my Cell phone into a wireless SIP phone when in
range of a hot spot. Would be really nice when I'm in Australia. Also
found an ssh client for it and a small roll out keyboard.

I know I can get my laptop to go online through this phone, but I wonder
if the phone can go online through my laptop. If so, anytime my laptop
has internet access, such as from Ethernet, the sip client on the
pda-phone would work. Thus turning it into a usb phone. Hehe. 

I love technology... Most of the time.

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Brian
McSpadden
Sent: Monday, October 18, 2004 5:45 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] VoIP over 1xRTT

It is not always the bandwidth, you are correct. There are however times
on the Sprint network that the bandwidth is reduced, or the bandwidth is
zero, because it can't connect to anything because the network is so
busy. WIth Sprint's CDMA 1xRTT network, voice and data share the same
network, but voice is the bread and butter of the business, so it will
get priority over data.

This is why I'm saying, EV-DO (and later EV-DV) will do great things for
VoIP over cellular networks. EV-DO (DO stands for Data Only), dedicates
a high speed data network, more available bandwidth for everybody, and
less latency, hence less jitter. I'm excited to see these developments,
as I believe it will make VoIP more reliable over these types of
networks. At the moment, there are simply too many variables to trust
it.

Brian

On Mon, 18 Oct 2004 17:36:14 -0400, Deon Rodden <drodden at webunited.net>
wrote:
> It's not the bandwidth. I have Sprint and am switching to Verizon with

> a week. When I go online through my Sprint phone, I get 250+ms 
> response
times.
> That can not be VOIP friendly. I have clocked downloads at up to 130 
> kbits per second, so the speed is ok, but the ping response times are 
> bad.
> 
> I've heard reports from Verizon users who get an average of 60-80 
> kbits
per
> second, so I 'feel' Sprint's network may be a little faster as their
average
> is higher, at least in my area. But Verizon is already doing the 2nd 
> stage rollout, which is nice and fast.
> 
> But the latency issue will probably still be there, for Sprint or 
> Verizon.
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