Re: Linksys VOIP Modem 2102 on Tranzeo wireless

Rangefire Wireless <rangefire@xxxxxxxxxxx> hath wroth:

Monitoring? Who cares?

You should if you plan to service this account. You can do quite a
bit of wireless troubleshooting with SNMP. It can be done from the
internet, but is much easier if it's done with a local admin PC, which
you don't have. For two customers, it's certainly overkill. However,
if the system grows, it should be considered. For example, if one
user catches a virus or worm that hogs all the bandwidth spewing spam,
how will you know whom to yell at?

From my perspective, I am a laborer putting in a piece of hardware for
the client. They own the service. The Cable company provides the
service.

Install and run? Well, that's one way to do business. Unlike land
line systems, wireless has the irritating habit of changing with the
seasons, with interference, and when something moves. You may not get
a call to fix a problem, but you certainly will get one to diagnose
one. Also, since you're the obvious first contact, you'll probably
get calls for all manner of nonsense that has nothing to do with your
installation. Turning that into a paying proposition is tricky but
not impossible. The trick is to not make it sound like you've
abandoned them.

I am considering using the Bomgar remote help desk appliance though.
http://www.bomgar.com/ The B100 unit costs about $2000 and can save
me a ton of driving.

Nice. Methinks an old PC running RealVNC, PcAnywhere, or XP Remote
Desktop, will do much of the same thing. Some routers have built-in
PPtP servers, which can be used for remote admin. I use all of these
at various sites depending on what I was trying to do at the time. The
down side is that even with your 10Mbits/sec speed, remote admin
performance is limited by the speed of the outgoing connection, which
I'll guess is less than 768Kbits/sec on your cable connection. If
this outgoing bandwidth is constipated by worms, DDoS junk, or spam,
remote admin becomes futile (unless you setup QoS).

I can even remote control Windows Mobile devices!

Now that would be interesting. I have a WM5 PDAphone (Verizon XV6700)
and a WM 2003 Samsung i700. This I wanna try (later).

OK. No router at the two farm house ends. Therefore, only the router
at the cable end needs to be port forwarded.

Wrong. Each of the farm houses also have the Tranzeo unit (TR900) to
receive their signal. The Tranzeo unit has a built in router that is
attached to the antenna. On the configuration screen (192.168.100.1)
I go to the DNS Servers and enter the primary and secondary servers
just as the head end has (same dns servers).

There's your problem. I've been trying to pry out of you where the
router(s) are located and the IP layout. You have what is called
"Double NAT" where the IP addresses are translated twice by the two
routers in the path. Each router will need to be setup with port
forwarding for the (assumed) SIP service you're using. Calling the
VoIP provider will be the obvious first step to find the ports that
need to forwarded.

Incidentally, I goofed when I suggested that port triggering will
work. It won't because there needs to be a permanent forwarding
established so that incoming calls will work. For example, for
Vonage, you need to port forward a mess of ports in the router(s):
<http://www.vonage.ca/help.php?article=1098>
<http://www.vonage.ca/help.php?article=1154>
It's the same with other providers, but possibly different port
numbers.

I accidentally found where Vonage mumbles that if you hear dial tone,
you have a connection to their system. No dial tone, no connection.

However, you have a potentially fatal problem. If both farmers have
the identical Linksys VoIP boxes, with the same VoIP service provider,
and requiring the same ports to be forwarded, it can't be done. That's
because the first router #1 can't port forward a port simultaneously
to two different IP addresses (the IP's of the two client radios).
You can get one to work, but not two or more. This is why I (wrongly)
assumed that you received more than one IP address from your cable
ISP, which would eliminate router #1 and make this thing work.

I think you had better take a close look at your network topology and
layout. Double NAT might work for some situations, but it's always a
problem with shared systems.

Please re-read my previous reply. Search for the question marks and
note how many of my questions you've ignored.

I'll go look after I post this because I can't go back while this is
open.

Actually, you can. I'm also using Forte Agent 4.2 and have multiple
windows and past posting splattered all over my shrinking screen.
(Either the screen is shrinking or my eyes are going. I prefer to
think the screen is shrinking). Just minimize the active window, and
then bring up any other message or window. From the top menu, use the
"Window" pull down to switch the active window as needed.

However, *ignore* implies intent. Ignore is a deliberate
action.

No, it does not. I don't spend all this time trying to answer your
questions for the sole reason of insulting you. My answers tend to be
long and involved. It's easy for someone to miss a question. In some
cases, the questions are solely designed to get you to think along
some particular line. In this specific case, I've asked repeatedly,
and in various ways, where are the routers? I'm slowly finding the
answers, which appear to be the source of your routing problem.


In this case is is not intent but lack of attention to detail
that appears insignificant to someone who doesn't know any better
(me). Also consider that I may be "unable" to answer due to my lack
of experience.

Possibly. As I recall (I hate re-reading my own postings), I only
asked questions about your configuration, topology, IP layout, and
installation. I think those are well within your level of expertise.

You won't be able to tell my why I have the problem with this Linksys
VOIP modem [model SPA 2102NA] unless you can relate to someone else
who you may have personal experience with and whom also failed to
achieve a dial tone. I just put it out there in case someone else has
experience with the same voip modem from linksys.

Well that's fine. I really have very little experience with VoIP and
the Linksys SPA-2102NA device. However, I have quite a bit of
experience with shared wireless systems and configuring routers to
work with various VoIP services. As I see it, you're looking for a
problem in the Linksys VoIP device, while I'm looking for a system
problem. The double NAT is the problem.

I don't know much yet, but I do know that this system is running well
otherwise. I suspect that the proxy address that the voip reseller
gave to me is unable to tunnel through. I may have to open port 5060
and 5061 on the Tranzeo Router. I don't know how to do that yet, but
will by Tuesday.

OK, that's a good start. Can I trouble you for the name of the VoIP
provider so I'm not guessing as to the IP port forwarding setup? Most
providers, such as Vonage Canada, have FAQ's and instructions that
detail the port forwarding setup.

I will call Linksys and ask them directly. What causes dial tone on a
voip phone? That is all I need to do .... to cause my phone to have a
dial tone!

While you're waiting for Linksys to answer, may I suggest you follow
my previous advice and drag the SPA-2102NA over to the cable modem
end, thus eliminating one router, and try it? I think you'll find
that without a successful SIP connection, you won't get dialtone.

Good luck and dump the double NAT.
--
Jeff Liebermann jeffl@xxxxxxxxxx
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
.

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