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  1. Junior Member Soondubu's Avatar
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    #1

    Default 2851 Sufficient for PSTN Lab Router?

    Hi All,

    I'm currently piecing together the PSTN Router for my voice lab and wanted to run this by anyone that might have some insight. Will a 2851 chassis be sufficient? Let me know what you think, thanks!

    -Soon
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  3. Junior Member Soondubu's Avatar
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    #2
    Also if anyone has a better alternative, I would greatly appreciate it. Thanks!
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  4. Senior Member Kelkin's Avatar
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    #3
    A 2851 would work fine.. I have a 2811 as mine.
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  5. Senior Member
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    #4
    Yes people use way less.
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  6. Junior Member Soondubu's Avatar
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    #5
    Here's what i've picked up for it:
    1x 2851
    2x pvdm2-16
    2x MEM2851-512D
    2x VWIC 2MFT-T1
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  7. Senior Member Kelkin's Avatar
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    #6
    Is this going to simulate your WAN as well? If so you will need another 2MFT.
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  8. Senior Member pitviper's Avatar
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    #7
    I’m using a 2821 for my CCIE Voice lab PSTN and it’s more than adequate. I was using a pair of 1760s for a good chuck of the NP Voice studies.
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  9. Junior Member Soondubu's Avatar
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    #8
    Yes it is.
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  10. Junior Member Soondubu's Avatar
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    #9
    Thanks! Just ordered everything and just waiting for it to get here.
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  11. Senior Member pitviper's Avatar
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    #10
    PSTN, WAN, and Terminal server (2821) on the bottom. Pic was taken before it was completely cabled up, but it's simialr to what you are looking to do.



    Working on the NP:Voice?
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  12. Junior Member Soondubu's Avatar
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    #11
    NICE! I wanted to get a rack but there's nowhere I could put one that big in my apartment without it being a complete eyesore. Yea, i'm shooting for NP:Voice.
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  13. Senior Member pitviper's Avatar
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    #12
    The open Skeletek racks are really nice if you haven’t checked them out yet. The full sized racks really aren’t meant to be used in a residential structure LOL I had to gut the basement due to flood, and was able to put a full rack down there before we started rebuilding. Now, it’s a part of the house (or would have to be sawsalled’ for removal!)
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  14. Senior Member
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    #13
    I'm using an old 3725 for both PSTN and WAN, fitted out with a VOICE30 for the DSPs, 3 x 2MFT's (4 x E1, 2 x T1) and 3 WIC-2T's. Using a 7960+7914 as my PSTN phone...all works fine.

    2821's as access servers? We've got a couple of 2911's at work for that...just seems so wrong, so many other/better uses they could be put to...but then I work for a state govt dept who don't work on home lab budgets...
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  15. Junior Member Registered Member
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    #14
    Hi all,
    I am just trying to setup my voice lab.. and have 2851 for PSTN router. right now I having issues with setup WAN serial interfaces.. do I need HWIC-4T1 ?
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  16. Senior Member pitviper's Avatar
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    #15
    WIC-2Ts or VWIC2s are much cheaper - I guess it depends on how you want to connect the branches = with DCE/DTE cables, or T1 crossovers (which you can make).
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  17. Senior Member
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    #16
    CCIE v labs use WIC-2Ts for WAN connections. And WIC-2Ts are very cheap on eBay (less than $20 IIMC). For CCVP, no need to bother with them. Just connect all routers/phones/servers to a 3560 switch, done.
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  18. Senior Member pitviper's Avatar
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    #17
    Quote Originally Posted by Flyingput View Post
    CCIE v labs use WIC-2Ts for WAN connections. And WIC-2Ts are very cheap on eBay (less than $20 IIMC).
    Until you add a couple of 2900s that don't support them
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    #18
    Im doing my best to understand the PSTN/Branch connections. So I can make a T1 crossover to connect the PSTN Router to the Branches to simulate the voice PSTN ? Then to simulate the Frame Relay Wan (data) to the same branches from the PSTN router I would use a rj-45 pinned out to 1-2-3-4-5-6-7-8 ---> 4-5-3-1-2-6-7-8 ? I found this link that seems to explain what I am trying to determine https://supportforums.cisco.com/thread/2229626. I was not aware you could simulate frame relay on ethernet. This is starting to make a little more sense. Last question, would it make sense to stay away from WIC-T's if just starting to build a lab, as they will not be supported on 2900's ? Thanks so much guys I really appreciate the feedback.
    Last edited by dentry; 10-25-2013 at 01:44 PM.
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    #19
    1. Yes you would make crossover cables from HQ/Branch routers to your PSTN. The Frame Relay and PRI will have to be on T1's you cant' simulate them ethernet without getting extra equipment involved. Your best bet is to get 2 port VWIC2 cards. They can be PRI's and Data T1's on the same device. As you pointed out the 2900 won't support the older cards so you should skip those.
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  21. Member
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    #20
    You guys are the best, love the support!
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  22. Senior Member pitviper's Avatar
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    #21
    Someone neg-reped me for help in this thread!?
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  23. Member
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    #22
    Weird, I gave you and shodown a positive rating...
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