[Asterisk-Users] large analog to asterisk

[C F]

The way to do this in my opinion is to stay with analog phones in the
room and *not* ip phones for a couple of reasons:
With Cellphones the way they are right now, you will never recover
and/or justify the costs ($60 per phone plus wiring for IP, vs $5 per
phone and no wiring for analog).
Over complicating the phone with too many features (as is the case
with IP Phones), just makes ppl not use them, in an office environment
you just train them.
I think you should stay with analog phones, and use VOIP cards with
the channel banks, and one asterisk box. ADIT 600 support a CMG card
which allows you to use MGCP with up to 48 channels per card. There
are 2 ways of configuring this:
1. For each 40 channels you use 1 CMG card (since it uses a slot you
can't use 48 channel in a single Adit 600 chassis with a CMG card),
this way you will be losing 8 channels per VOIP card since you can
never use the resources of the card to for the 8 remaining channels is
supports.
2. For each 4 adit 600 chassis you use a fifth one that has 2 quad T1
cards, and 4 CMG cards. You plug the 4 chassis to the 8 T1 ports, and
you use the 4 CMG cards to convert up to 48 channels to VOIP (you
can't use the built in t1 ports on an adit 600 if you use the CMG).
You could also configure it relying that not all the rooms will make a
call at the exact same moment. In which case you could modify #2 above
with another Quad T1(for a total of 3), and only 3 CMG cards, and a
total of seven Adit 600 chassis for each set. Plugging in the 12 T1s
to the 3 Quad T1 cards, and this will allow for upto (48 *3) 144
simultaneuos conversations (50% of available ports), instead of 288
(12 * 24) 100% available ports.

Hope this helps.


On 4/15/05, Andy Hamilton <ciscophonefreak at gmail.com> wrote:
> And then you'd need to purchase 700 VoIP phones; not a small investment.
> With all due respect to Mr. Schelin, I think the analog method may be
> best, unless you plan to expand the services that you offer to the
> guests. If the rooms did have cat3, you could eventually expand your
> offering to include internet access for the guests, advanced phone
> features (on the IP phones), etc...
> I stray from the topic.
> 
> You'll be facing some sort of hardware investment aside from the
> server, I think, and that is either IP Phones or a lot of hardware to
> support the analog lines, per Rusty's suggestion.
> 
> Granted, this will be a large project, I think it would be wise to
> weigh the benefits of going to IP Phones now that will most likely go
> mainstream in the near future or support an aging but solid analog
> technology.
> 
> -Andy
> 
> On 4/15/05, Michael D Schelin <mike at shelcomm.com> wrote:
> > If your rooms analog phones are wired with cat 3 cabling you can do 10
> > Mb over it.  Convert all the rooms to Ethernet  and use large switches.
> > One Asterisk box should do the trick. Remember not every room will be
> > using  the phone  system at the same time.  This should work for you.
> >
> >
> > shane fowler wrote:
> >
> > > we are looking at the ability of being able to convert large phone
> > > system over to asterisk or if it's possible at all.  The building is
> > > two sections containing a large office section (with data cabling) and
> > > the second section is a hotel with no data cabling.  The first section
> > > is a no brainer with sip hard and soft phones but the hotel part is
> > > where the problem lies.
> > >
> > > The current count of rooms in the hotel is about 600...that's at a
> > > minimum 600 analog connections.  Some rooms have 2-3 phones so as a
> > > rough number i'm saying 700 total.  I see where some people use the
> > > Adit 600 to do up to 48 analog connections that trunks over 2 T1
> > > connections back to asterisk but for 700 phones thats 15 Adits with 30
> > > T1's....how in the world would you do that??  just several asterisk
> > > servers with 2-3 Adits per server?  is there any other way?  I'm open
> > > to suggestions.
> > >
> > > Thanks..
> > >
> > > Shane
> > >
> > >
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