[Asterisk-Users] Rhino Channel Bank or ADIT 600

[Jerry]

> I don't know what you mean by talk.
> Cost difference:
> well this is how I calculated it, one the overall cost of having to
> get an asterisk box that needs more CPU, and 2 the actual cost of the
> cards to make it work. As well as taking into considiration that adit
> is telco grade equipment, and has very good performance.
> Option 1: An adit 600 loaded with 6 FXS cards = $800, Digium Quad t1 = 
> $1500.
> Option 2: An adit 600 with 5 FXS cards, and 1 CMG02 card = $1500 (Max,
> you could get it for cheaper).
> Option 1 for 384 (8 * 48) analog ports: 8 * 800 + 2 * 1500 = $9,400.
> (around $24.50 per port)
> Option 2 for 360 (9 * 40) analog ports: 9 * 1500 = $13,500. ($37.50 
> per port)
> But option 2 can all go on one asterisk box, since it's all voip, and
> no transcoding has to take place (in fact it's like getting 9 more
> asterisk boxes to give you some more horsepower). With option 1 you
> will run into problems of using more than one digium card on one box,
> although it works, it is not recommended. Consider that a dual xeon
> system costs $3000 you will end up paying $7,700 for each pair of 4
> adit boxes, and this doesn't even give you the options of adding telco
> t1s.
>
> In my opinion using the CMG cards will pay out in every single way
> when you are talking of anything more than 2 Adit boxes to a single
> system.

Couple observations.

Adit with CMG uses MGCP vs SIP. Not sure how extensive the * support is 
for this. I believe Carrier Access is working on a SIP release but not 
sure how complete it will be. CMG/CMG2 are nice cards. Also have a nice 
license builtin for G729. If you use though you will need a matching 
one for the * server. However there is also a call limit of 12, I 
think, for the CMG and 24 for the CMG2 cards. Depending on application 
you could easily exceed this. So take the 8 T1 capacity with a grain of 
salt, you will not be able to have that may calls up at a time.

Also one of my favorite applications is connecting an Adit directly via 
T1 to a Digium card. Then using another T1 port on the Digium card to 
connect to PRi from PSTN. This is called a traditional TDM switch. No 
IP in the patch, no headaches. Great for such things as FAX and ALARM 
circuits which are very problematic with IP in the path.

It is not always about up front costs but about capabilities and 
support costs down the line.