[nflug] Router Questions

[David J. Andruczyk]

--- Joe <josephj at main.nc.us> wrote:

> I understand what a router is, but I've never worked with one, so
> I've 
> got some basic questions.  I don't expect anyone on this list to
> debug 
> my VoIP (SunRocket) problem.  The questions below are mostly OS and 
> vendor independent.
> 
> I'm having trouble getting VoIP to work for my partner (I'll be
> talking 
> to VoIP level 3 support later.)  She has Verizon DSL.  I don't
> remember 
> the exact speeds, but it's about 800/168 (the slowest/cheapest).  The
> 
> VoIP says it needs 90/90 to work.
> 
> Currently, the DSL line comes into the Modem, out to the VoIP box,
> and 
> then from the VoIP box into the notebook (Win 98se). Nothing has 
> wireless capabilities.
> 
> When I hook up the DSL without the VoIP box, it works fine.  When I
> put 
> the VoIP in the middle,  not only does it not work, but the DSL goes 
> away and when I remove the VoIP box, I have to argue with the DSL box
> 
> for awhile to get it to work again.

Solution.  Install in sequence below:
DSL line -> DSL modem-> VoIP box - >Laptop

power off all device (INCLUDING the dsl modem)
power up DSL modem,  wait till all lights on it say it's ready and
working,   power up Voip box make sure it becomes "ready",  then power
up laptop, and all should be working correctly now.  Make sure the
laptop is configured for DHCP. (almost all are). 

Reason:  DSL and cable modems detect the MAC address of the device
directly plugged into them (whether it be a router, computer, appliance
device, etc), and refuse to accept traffic from any other MAC address
unless powercycled.    MAC addresses do NOT cross router boundaries
(read up on the OSI model if you really want to know why). The Voip box
is essentially a simple router device with added gee-whiz stuff inside
(the voip crap). 




Dave J. Andruczyk

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