[asterisk-users] FXS channel banks

[Tzafrir Cohen]

On Fri, Mar 07, 2008 at 08:28:14PM -0500, Steve Totaro wrote:
> 
> Ethernet/SIP is going to be by far the most flexible.
> 
> You can have much longer cable runs without some kind of USB repeater
> device.  Switches are cheap, CAT5/6 is cheap.
> 

> You could put a Quintum Tenor AX 48 Port (for instance) in one section
> of a building, campus, LAN (WAN if you are daring) and the server
> could be anywhere, not tied by 15 or 30 foot USB cables.  Then if you
> are doing new wiring, you can run the shortest distance from the
> location of the SIP FXS device to the phones.

Just think of a different alternative: If you consider the cost of a
24/32/48 FXS channel bank, vs. the cost of the PC used to driver it:
just put a simple PC at that end of the campus and attach the Astribank
to it.

> 
> You can have redundant, self healing links as well as link aggregation.
> 
> I cannot see how TDMoE or USB come anywhere close to this flexibility
> and certainly don't see it being a fit for high port densities like
> discussed.
> 
> I see TDM0E as something that a tech guy thought would be cool (and it
> is but not very practical) and a USB device something suited for the
> SoHo (but missing the scalability, redundancy, and flexibility that IP
> gives.)

As for USB: this is also what I thought before actually starting to work
with it. Sure, there are limitations. But the Linux USB stack is a nice
one.

As for TDMoE, I know that at least the current ztd-eth in Zaptel is 
considered "broken". Fixing it would be appreciated if you actually want 
to use it :-)

-- 
               Tzafrir Cohen
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