I have started watching the CBT Nuggets CCNA Voice videos this week and have been looking at what hardware I have and what I will need to build a decent lab for this as well as something that will be useful as I move into my CCNP studies this summer. CCVP is on my radar too so voice capability is important.
I have 4 2600XM routers with max memory. I have a NM-16A terminal server module, 6 WIC-1DSU-T1 (not V2) modules, 3 WIC-1T's, and a pair of NM-1E's. I have been playing with the Cisco Software Advisor and just noticed that while a bare 2600XM will run the latest 12.4T, if I add any of these modules then the latest I can run will be 12.3. These modules are older are not supported in 12.4 or 12.4T on the 2600xm. Nice.
I have a VIC-2FXO-M1 and was going to get a VIC-2FXS and NM-2V for it. Again, software limitations. Bah. NM-HD-2VE and VIC2 modules are what is really needed on a 2600xm to run 12.4T.
I got to looking at the 1760 on Cisco's Software Advisor and noticed that it DOES support all of my older WICs and older VICs (non-VIC2-VICs) and does it under 12.4T. Alright! The 1760 is a pretty awesome little lab platform considering this fact. The older modules are dirt cheap on fleabay.
Are there any downsides to the 1760 over the 2600XM? Any other useful lab platforms that won't break the bank? I still can't get over Jeremy Cioara's reccomendation of a 2801 with a AIM-CUE for labbing the CCNA-V. Who has $2K lying around for an associate-level lab router? (I spent my last $800 on my WLC for CCNA-Wireless.

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