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:* [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
*Sent:* Wednesday, January 11, 2006 1:53 PM
*To:* [email protected]
*Cc:* [EMAIL PROTECTED]; [EMAIL PROTECTED]
*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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