[GLLUG] sbc x comcast

Tue Jun 28 23:57:46 EDT 2005

Scott,

I believe that ACD.NET offers VoIP by providing a separate gateway adapter (ATA); this also requires a router, which ACD can provide as well.  (Some routers offer the gateway adapter built-in as well.)  This allows connecting existing standard phones to the ACD VoIP network.  Also. there are a number of different ways to implement VoIP on a broadband network, some of which allows optimization for voice traffic.  Voice quality over VoIP is very dependent on network latency and packet loss.  One of the better ways to optimize voice traffic is if the DSL modem, gateway, or router can mark the voice data packets as requiring high-priority, low latency handling, and then if the broadband provider's network is configured to use this information to provide the requisite quality of service to voice traffic.  Probably best to check with your current or prospective broadband provider to see how they handle VoIP traffic on their networks.  Here is a link to more information at ACD:
 http://www.acd.net/voip/questions.htm 
though I did not see any discussion of the specific technical details about voice quality of service.  Hope this helps.

Perry

Scott Henry Harrison <harris41 at msu.edu> wrote:
Perry_rg writes: 

> Before I moved last November from the Eastside Neighborhood in Lansing, I had ACD.NET DSL for several years. They seemed to have pretty good uptime. The equipment ACD was using at the time allowed them to provide and maintain speed at a farther distance from the CO than SBC, and ACD was not using PPPoE, as far as I know. My installation used a dedicated pair rather than an existing phone line, so I could have quit my SBC phone service if I had wanted to. Also, I believe ACD now offers VoIP for most of its service areas.

Hi Perry.... 

Just a newbie question... why does VoIP have to be "offered"
when all you need is a broadband connection (and then
get VoIP service elsewhere)? I guess you were probably meaning
that ACD offers an integrated package so that users
can get a voip service on top of broadband both at once
(and maybe for cheaper)... 

I'm just worried/wondering if my SBC/yahoo dsl connection
will support voip or if there is something else inherent
to a broadband connection I'm missing.... 

Thanks. 

Regards,
Scott 

> 
> Where I live now, in the Genesee Neighborhood in Lansing, I have both TDS Metrocom phone service and TDS DSL service. I pay $72 a month for the combined phone and DSL service, over a single pair. It seems like every several days I have to reboot my DLS modem/router, but some of that could be because I still run Windows ME on my main computer. (Kind of like the cobbler with bare-foot children; I work on Windows XP computers and yet none of my home systems run it!)
> 
> I have very little personal experience with cable broadband, other than working on people's computers connected to cable. I find that, when it operates well, cable seems pretty fast. But if there are a lot of computers connected to the cable segment that are infected with trojans or viruses, then traffic drastically slows down. Comcast seems very lax in provisioning their customers. All they provide is a cable modem and don't seem to provide any software or even advice to protect their customers from the Internet. In my latest experience with a Comcast cable broadband connection, once I added a hardware firewall, and got my friend's computer cleaned up from all the spyware that was on it, her computer and Internet connection ran significantly better.
> 
> Perry Godwin
> Thelema Networks
> tel: 517-485-2544 x3
> email: peregryn2356 at yahoo.com 
> 
> 
> Nick Kwiatkowski wrote:
> One thing to note with SBC vs. Comcast -- SBC in the Mid-Michigan area uses
> PPPoE (PPP Dialer over Ethernet) to authenticate its users. Because of
> this, every time you are forced to "re-dial" your connection, you will more
> than likely get a new IP address. 
> 
> Speed and ping-times for DSL are dependent on the distance from the Central
> Office. To find out the distance to the central office from your location,
> use DSLReport's website : http://www.dslreports.com/prequal/distance.
> Under 10,000 feet you should have no problem obtaining any speed they offer
> -- under 15,000 you should have no problem with a 1MB service... as you get
> closer to 20,000 your service will become slower. 
> 
> You may want to check other DSL services as well. ACD.NET, Arielink
> (CRT.NET), EarthLink, and others have a strong presence in the Lansing
> market.. 
> 
> Hosting can be a tricky thing with ANY ISP. While most do not care, some
> will scan their subnets for any commercial websites that are operating.
> Just keep that in mind when you are setting up anything that answers on port
> 80.. 
> 
> As far as having a web-server on port 80, SBC by default will block port 80
> (and 25, 110, among others), however a quick call to the tech support line
> will open it up. Other ISPs that I've used, CRT and ACD do not block any
> incoming ports by default. 
> 
> Using a service such as DynDNS.ORG, or DtDNS.NET will allow you to have your
> own hostname / domain name come to your box. Just take a look at which
> clients are available for each. Some services have only a Java or win32
> client, where some give you Perl or c++ scripts to compile on whichever OS
> you use. 
> 
> Hope some of this info helps :) 
> 
> -Nick Kwiatkowski 
> 
> 
> -----Original Message-----
> From: linux-user-bounces at egr.msu.edu [mailto:linux-user-bounces at egr.msu.edu]
> On Behalf Of tk3000
> Sent: Monday, June 27, 2005 3:09 AM
> To: linux-user at egr.msu.edu
> Subject: [GLLUG] sbc x comcast 
> 
> Hello, 
> 
> Most likely, I will migrate from comcast to sbc (given the price point). I 
> would like know if anyone could give some advice about any noticible 
> difference between both. And also, in terms of IP address; my IP addres with 
> 
> comcast is dynamic, but usually I stay with same IP address for weeks and if 
> 
> I don't disconnect or reset the modem probably even longer. Would the IP 
> address with sbc work in similary way? 
> 
> And I also would like to know your opinion about the pos and cons of hosting
> a 
> website in a local machine via sbc or comcast connection (with dynamic ip 
> address) and with DynDNS.org Account for redirection of Dynamic IP Address 
> to FQDM. 
> 
> Thanks in advance,
> Pedro Wald 
> 
> 
> 
> 
> 
> 
> 
> -- 
> 
> Key-ID: 500E7A68 (pgp.mit.edu)
> Public-Key can be retrived from: home.comcast.net/~pdwald/pkey.html
> ----------------------------------------------------------------------------
> ---
> K7VTA Pro, Athlon XP 1.7MGhz+, Via Chipset KT133A, 256 ram,80 gigs.
> Slackware 10 + kernel 2.6.11.8
> _______________________________________________

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