Post by sms
Has anyone else here done do-it-yourself VOIP rather than using Ooma,
Yep. My guess is about 8 home users with variable results. Most
common complaints revolve around administering the account online,
configuring phones, problems with fax machines, and general difficulty
understanding the technology.
For Comcast (and others), you will need to enable and configure QoS:
in order to prevent the phone call from being mangled by other traffic
on the router. Comcast firmware does not offer QoS by service, such
as SIP, so could have problem. I avoid the issue by using a separate
cable modem, followed by a real router.
For home users, I like Future-Nine:
Three big advantages. Cheap, cheap, and cheap. I use the "Bare
Essentials" plan at $75/year. I don't have 911 service because I have
three SIP phones on the same phone number. Essentially, they're
treated as "extensions" and all ring at the same time for incoming
calls. I have one in my office, my home, and a softphone on my
various devices. If you're going to do this, make sure your VoIP
provider supports "extensions" in this manner and hopefully doesn't
You'll find some vendors, such as Callcentric:
that charge separately for incoming and outgoing service. This gives
some flexibility in billing, but also creates some confusion. For
example, I have a client with one incoming line, which has a proper
DID phone number assigned, but 3 additional lines that are outgoing
only with no phone numbers, which saves quite a bit of money.
Note that calls between SIP phones are free. I setup a pair of SIP
phones for a customer that has several people working at home. They
could have uses Skype, Netmeeting, or other conference calling
software, but wanted something that require a 24x7 computer, and that
would work through the company SIP phone system. When calls can last
all day, the free direct SIP to SIP feature is nice.
One problem that drives me nuts are attacks from the internet to ports
5060-5064 on my SIP phones. I guess they're looking for Asterisk
switches or misconfigured phones. The result is my phones are
sometimes hung or confused.
Before you take the plunge, methinks it's a good idea to test your
Comcast connection for jitter and packet loss. I've seen some Comcast
lines that can download at 16 Mbits/sec, but are terrible for jitter.
Try several of these online VoIP test sites:
Here's the report for my 1.5Mbit/sec DSL line using G.711(64Kbits/sec)
which shows that my line is marginal.
Jeff Liebermann ***@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558