asterisk users - Nov 2005 - Would DECT cordless phones work with Asterisk and VOIP?

I've just heard about DECT which is used for about 50 million phones in 
Europe and is just starting to appear in the US.

DECT stands for Digitally Enhanced Cordless Telephone
and supposedly has much greater range than other cordless telephony.
Additionally, you can purchase repeaters that will greatly range.

Since reading about poor audio quality and echo issues caused by 
repeated conversions as the signal traverses the path from the (possibly 
POTS analogue) station, over tcp/ip and to destination,
would DECT (another digital form) agravate this?

In my house, a Uniden 5.8 and Panasonic 2.4 cordless system would only 
work over about 35 feet indoors - not enough for a large house.

Does anyone have any hands-on experience with DECT?

Larry

-- 
Larry Alkoff N2LA - Austin TX
Using Thunderbird on Slackware Linux

> I've just heard about DECT which is used for about 50 million 
> phones in Europe and is just starting to appear in the US.
I didn't realise they'd not been around in the US for long. I've had
DECT
phones for at least 5 years now...
> In my house, a Uniden 5.8 and Panasonic 2.4 cordless system 
> would only work over about 35 feet indoors - not enough for a 
> large house.
> Does anyone have any hands-on experience with DECT?
They work fine, and over quite a substantial range provided you haven't got
an old cottage with 2ft thick walls and lead piping running around the
place. When I was living in Exeter I found that I could take the DECT phone
about 100 yards down the road to the Chinese takeaway with me and it'd still
be able to pick up calls.

To asterisk: I've got 2 DECT phones at home currently on Grandstream HT-488
and Sipura SPA-3000 ATAs respectively, both of which work fine. You might
need to play with the settings on your ATA to get the recall function
working properly, but apart from that they seem fine. I have not tried them
with a TDM400's FXS port.

Regards,

Chris
-- 
C.M. Bagnall, Director, Minotaur I.T. Limited
This email is made from 100% recycled electrons

On Sun, November 27, 2005 1:46, Larry Alkoff said:
> I've just heard about DECT which is used for about 50 million phones in
> Europe and is just starting to appear in the US.
>
> DECT stands for Digitally Enhanced Cordless Telephone
> and supposedly has much greater range than other cordless telephony.
> Additionally, you can purchase repeaters that will greatly range.
>
> Since reading about poor audio quality and echo issues caused by
> repeated conversions as the signal traverses the path from the (possibly
> POTS analogue) station, over tcp/ip and to destination,
> would DECT (another digital form) agravate this?
>
> In my house, a Uniden 5.8 and Panasonic 2.4 cordless system would only
> work over about 35 feet indoors - not enough for a large house.
>
> Does anyone have any hands-on experience with DECT?
>
> Larry
>
I have a Siemens Gigaset 4030 DECT station at home. It is an ISDN
deskphone with built-in DECT access point. I have finally got 2 HFC-PCI
cards running simultaneously in TE and NT mode, and will be connecting the
4030 to the NT mode HFC-PCI card soon. (I'd like to do it today, but my
MIL has 'invited' us for ST.Nicholas (Dutch fest, usually on 5 Dec, with
lots of children's gifts, similar to Xmas Eve in USA) today!)

As soon as I have some test-experience with the setup I will:
- Let the list know (both this thread and the '2 hfc-pci cards do not
work' thread)
- Write an extensive wiki article on the setup for others to learn from...
 ;-)

Cheers

-- 
Francesco Peeters
----
GPG Key = AA69 E7C6 1D8A F148 160C  D5C4 9943 6E38 D5E3 7704
If your program doesn't recognize my signature, please visit
http://www.CAcert.org/index.php?id=3 to retrieve the Root CA certificate.

Larry Alkoff wrote:
> In my house, a Uniden 5.8 and Panasonic 2.4 cordless system would only 
> work over about 35 feet indoors - not enough for a large house.
> Does anyone have any hands-on experience with DECT?
I have recently discovered kirk (kirktelecom.com) wich also uses 
something like DECT, but according to their website, a modified version. 
Now, what makes this interesting is, you can use 'repeaters' so you can 
even bridge larger distances. (you can use multiple repeaters, but there 
is a maximum, check their website)

To summarize, I'm using: IP600 and a Kirk4020 and 4040 and a 
repeater-box. The only drawback is, you can't use "regular"
dect-phones
with this system.

I found them to be very reliable, and when using chan_sccp, you can 
interface very smoothly with asterisk.

cheers!

Larry Alkoff wrote:
Snip ...
> 
> Does anyone have any hands-on experience with DECT?
> 
We have an old BT DECT phone in the house, connectd to an FXS port on a 
TDM400 card.  We get a burst of white noise (inaudible to the guys at 
the other end) for about half a second when we pick up, but apart from 
that it's fine. Range is about 100m in clear air. We have 3 ft thick 
stone walls and it copes with that very well.

jd

-- 

John Daragon                                          john@argv.co.uk
argv[0] limited
Lambs Lawn Cottage,  Staple Fitzpaine,  Taunton,  TA3 5SL,  UK
v +44 (0) 1460 234068   f +44 (0) 1460 234069   m +44 (0) 7836 576127

On Sat, 26 Nov 2005 18:46:17 -0600, Larry Alkoff wrote:
>I've just heard about DECT which is used for about 50 million phones in 
>Europe and is just starting to appear in the US.
>
>DECT stands for Digitally Enhanced Cordless Telephone
>and supposedly has much greater range than other cordless telephony.
>Additionally, you can purchase repeaters that will greatly range.
>
>Since reading about poor audio quality and echo issues caused by 
>repeated conversions as the signal traverses the path from the (possibly 
>POTS analogue) station, over tcp/ip and to destination,
>would DECT (another digital form) agravate this?
>
>In my house, a Uniden 5.8 and Panasonic 2.4 cordless system would only 
>work over about 35 feet indoors - not enough for a large house.
>
>Does anyone have any hands-on experience with DECT?
>
>Larry
The DECT implementation we see in the US are I presume deployed with
normal analog line connections, unlike in Europe where many phones are
ISDN based. Thus you may not be able to avoid the D > A > D conversion.


ISDN cards that work with US standard ISDN lines are essentially
unheard of. Many of us who have been dissatisfied with small FXO
adapters would LOVE to order up ISDN lines and skip the whole FXO
problem altogether. There are several/many ISDN cards that work with
Asterisk in Europe. I've yet to find even one that would work with an
SBC ISDN drop.

I'd welcome someone proving me wrong on this.

Michael Graves

--
Michael Graves                           mgraves@pixelpower.com
Sr. Product Specialist                          www.pixelpower.com
Pixel Power Inc.                                 mgraves@mstvp.com

o713-861-4005
o800-905-6412
c713-201-1262
fwd 54245

Larry Alkoff wrote:
> I've just heard about DECT which is used for about 50 million phones in
> Europe and is just starting to appear in the US.
> 
> DECT stands for Digitally Enhanced Cordless Telephone
> and supposedly has much greater range than other cordless telephony.
> Additionally, you can purchase repeaters that will greatly range.
> 
> Since reading about poor audio quality and echo issues caused by 
> repeated conversions as the signal traverses the path from the (possibly 
> POTS analogue) station, over tcp/ip and to destination,
> would DECT (another digital form) agravate this?
> 
> In my house, a Uniden 5.8 and Panasonic 2.4 cordless system would only 
> work over about 35 feet indoors - not enough for a large house.
> 
> Does anyone have any hands-on experience with DECT?
I am so keen on getting the Kirk telecomms 600 system to hook to asterisk, 
anyone know where to get one from that will ship to New Zealand?
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Richard Malcolm-Smith wrote:
> I am so keen on getting the Kirk telecomms 600 system to hook to 
> asterisk, anyone know where to get one from that will ship to New Zealand?
You could try asking in the asterisk irc channel, there regularly are 
some people from New Zealand in there, they might have an idea where to 
get one from..

If not, I can always have a look on shipping one to you..  (contact me 
off-list then)

cheers

There is a Kirk distributor for NZ.

http://www.wavelink.com.au/

Good luck,
Joe