To do DSL entirely within the lab would require having the provider gear
(DSLAM etc.) in the lab. Same as ISDN, ATM, X.25, or Frame-Relay --
except the last two can be emulated by a Cisco Router. To do ATM
switching, you need an ATM switch, and an ISDN switch to do ISDN
switching. The DSL "modem" is just the circuit endpoint/CPE.
Fortunately, if you have to know how to provision DSL provider equipment,
your employer will likely send you to some telco schools. The bits you
should know how to do (user-end ISDN or DSL configs) can be done with a
live DSL or ISDN line, easy enough to get, if you're within range of the
telco.
I was not suggesting that you have to have DSL to do VoIP with this
router, you can connect it to the network over the ethernet interface, and
run VoIP over that circuit.
The 1750-4v is a good suggestion for a VoIP router, but it's around $2k --
the 827-4v has less memory and a slower processor, but is around $1k. For
a production network, it's a kludge, because it only has the DSL WAN port
-- you'd need another router to connect the 827-4v to your WAN. However,
for a practice lab, I'd rather get two routers than one, for the same
money. Then you can play with QoS and LAN/WAN traffic engineering, and
watch the circuit suffer without that QoS.
-jon-
John Nemeth wrote:
> Not to mention the DSL port. I've been wondering how one could do
> DSL in a lab?
> On Sep 14, 11:18am, "Jon" wrote:
> } Might look at the 827-4v router, as well. It's an Alcatel-DSL modem,
> with
> } an ethernet interface and four FXS interfaces. Should be able to buy
> two
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