[asterisk-biz] Need a solution for wifi connection with Aster isk

[Mark Phillips]

I don't have the right solution but I do have experience in the 
described environment.

I recently upgraded a WiFi installation at my local Lennox Air 
Conditioning warehouse. They have a similar 2KM sized unit with an 
additional outdoor storage area across the street. In this instance the 
connectivity was required for the fork lift trucks as they operated a 
Just In time shipping operation.

Even though they had 2.4GHz WiFi nodes nailed to the ceiling they had a 
significant number of dead spots around the site and could not reach 
across the road.

I installed a few 900MHz bits of equipment and changed the NIC in a few 
lift trucks to 900MHz. I put a beam up on the roof pointing down into 
the yard across the street. This was a total success and the rest of the 
gear was swapped out for 900MHz.

Now I'm not saying that you can get 900MHz IP phones but you may be able 
to purchase some higher powered analogue phone stations and litter them 
about the ceiling void in the warehouse.

As for the offices, I'm stumped. My experience with WiFi phones is that 
they don't roam very well requiring the user to force a network search.

Something you could look at is a phone patch. You could equip your staff 
with UHF radio's (UHF has good in-building penetration) and have a few 
phone patch adapters hanging off an ATA. The roaming users could then be 
called at an extension which would off hook and pass the voice through 
to the radio's. Yes every radio user would hear the conversation but at 
least you'd be able to get them pretty much anywhere on the site without 
having to litter too many antennas around the place.

The radio users generally have to dial an access code via the radio's 
keypad to gain access to the dial tone. When they have the tone they can 
then dial the relevant extension number.

If you need closed user groups you put different user groups on 
different channels. An added bonus is that the radio users can talk to 
each other without tying up the phone system.



Mark, G7LTT/KC2ENI
Randolph, NJ
http://www.g7ltt.com


Colin Anderson wrote:
> Use a GSM to SIP gateway to cut your airtime and issue cells with M2M 
> enabled. I did this:
>  
> http://lists.digium.com/pipermail/asterisk-users/2005-December/138400.html
>  
> hth
> 
>     -----Original Message-----
>     *From:* asterisk at sipspain.com [mailto:asterisk at sipspain.com]
>     *Sent:* Wednesday, January 11, 2006 1:53 PM
>     *To:* asterisk-biz at lists.digium.com
>     *Cc:* esanchez at europesip.com; igil at europesip.com
>     *Subject:* [asterisk-biz] Need a solution for wifi connection with
>     Asterisk
> 
>     Hi,
>      
>     One of my customers, that currently have Asterisk installed for more
>     than 300 extensios and is very happy with the solution, needs to add
>     some mobile extensions.
>      
>     That extension (20 aprox) need to be used on the terminal station
>     (they are a transport company), and around a superfice of 2,000
>     m2.   Initially, we thought about adquiring wifi phones and wifi
>     spots on all the complex, but we are afraid of trunking.. I meant...
>     what happens if a user is not further reachable by a hotsport and
>     need to trunk to another one ? Is this done automatically ?  A lost
>     of 3-4 seconds on data transmition on wifi is not critical (to allow
>     trunk to be done) but it is a mojor concern on voIP, since it would
>     hang your communication.. also, not sure if the trunk (movement from
>     one wifi hotspot to another) will be done automatically or not.
>      
>     I do not known what solution to give, since DECT mobiles conected
>     using an ATA to asterisk will not have enough range to satisfy the
>     customer......
>      
>     Could any one advise on what solution to follow ?
>      
>     Thks
> 
> 
> ------------------------------------------------------------------------
> 
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