| Author |
Message |
Tim C.
Guest
|
 Posted:
Sat Jan 01, 2005 7:44 pm Post subject:
DSL and caller ID, TDD, and alarm systems |
|
|
Are there an special provisions needed for DSL and caller ID to exist
peacefully together?
My parents are getting DSL, and plan on getting caller ID in the
future. I am under the impression that they must have an external DSL
splitter (or filter) for caller ID to function correctly. Is this
true?
Same rules for alarm systems and TDD? Please set me straight.
Thanks,
Tim C. |
|
| Back to top |
|
 |
Neil W Rickert
Guest
|
| Posted:
Sat Jan 01, 2005 7:44 pm Post subject:
Re: DSL and caller ID, TDD, and alarm systems |
|
|
"Tim C." <fs63@volcanomail.com> writes:
| Quote: | Are there an special provisions needed for DSL and caller ID to exist
peacefully together?
|
There isn't any problem with caller ID and dsl, provided that all
telephony devices are filtered.
| Quote: | Same rules for alarm systems and TDD? Please set me straight.
|
Apparently, alarms can cause problems, unless carefully filtered.
Best is to go with a whole house POTS splitter if you plan to use
an alarm system. |
|
| Back to top |
|
|
David H. Lipman
Guest
|
| Posted:
Sat Jan 01, 2005 8:00 pm Post subject:
Re: DSL and caller ID, TDD, and alarm systems |
|
|
No. They happily coexist as long as all analogue devices use microfilters.
--
Dave
"Tim C." <fs63@volcanomail.com> wrote in message
news:1104590688.138629.201850@c13g2000cwb.googlegroups.com...
| Are there an special provisions needed for DSL and caller ID to exist
| peacefully together?
|
| My parents are getting DSL, and plan on getting caller ID in the
| future. I am under the impression that they must have an external DSL
| splitter (or filter) for caller ID to function correctly. Is this
| true?
|
| Same rules for alarm systems and TDD? Please set me straight.
| Thanks,
| Tim C.
| |
|
| Back to top |
|
|
Tim C.
Guest
|
| Posted:
Sun Jan 02, 2005 7:59 pm Post subject:
Re: DSL and caller ID, TDD, and alarm systems |
|
|
David and Neil,
I thought the caller ID couldn't get past the phone filters to the
phones ??? .....apparently it can.
thanks for the responses,
Tim |
|
| Back to top |
|
|
Arnie Goetchius
Guest
|
| Posted:
Sun Jan 02, 2005 11:21 pm Post subject:
Re: DSL and caller ID, TDD, and alarm systems |
|
|
Tim C. wrote:
| Quote: | David and Neil,
I thought the caller ID couldn't get past the phone filters to the
phones ??? .....apparently it can.
thanks for the responses,
Tim
|
Here is how I do it. The DSL kit came with 4 filters but I only use
one to filter everything including the Caller ID device
_________
Telco _DSL __________________________________! !
Connector / Modem ! PC !
Block ___/_________ !_________!
==== ! Radio Shack! !
[ ] Line __! Duplex Jack! !
==== ! 279-448 ! !
!____________! !
\ ________ !
\_ DSL___! Radio !_$$_ WECO Key equip !
Filter ! Shack ! with 3 telephones !
! !_$$_ Fax Dial Up from PC _______!
! Wiring !
! Block !__ Panasonic KG XT 5110 2 phone
! !
! 279-430!___Acatel 2840 Webtouch Phone
! with dial up access
! !__ AT&T 612 desktop phone
! !
! !__ Radio Shack Wall Phone
! !
! !_$$_ 2 Dish Network Receivers
! !
!________!___AMCAMEX Caller ID Display
$$ indicates the use of either Radio Shack Single or Duplex Jack
to facilitate quick disconnect for testing purposes. |
|
| Back to top |
|
|
Tim C.
Guest
|
| Posted:
Mon Jan 03, 2005 2:15 am Post subject:
Re: DSL and caller ID, TDD, and alarm systems |
|
|
Thanks Arnie. Good job on the diagram - - I can see that caller ID
works even thru the filter.
Tim |
|
| Back to top |
|
|
Peter
Guest
|
| Posted:
Mon Jan 03, 2005 2:16 am Post subject:
Re: DSL and caller ID, TDD, and alarm systems |
|
|
Hi Tim,
| Quote: | Are there an special provisions needed for DSL and caller ID to exist
peacefully together?
|
None. A phone line passes all frequencies the cable is capable of
handling and standard telephones use just a small part of the
frequency spectrum available (~300Hz - 3400Hz), which are just VOICE
FREQUENCIES. Caller-id uses this bandwidth to receive its info from
the exchange, which is (usually) sent as a 300bps modem data string
between ring signal 1 and ring signal 2.
DSL uses frequencies way above human hearing so it does not clash with
Caller-id or in fact ANY Voice Frequency operation. These are HF and
VHF frequencies
The "DSL Filter" that is needed is simply to remove the DSL HF & VHF
from the line, before the voice LF signals are passed to the telephone
hardware, as some older telephone H/W does not like the DSL frequency
signal present in what they see.
| Quote: | My parents are getting DSL, and plan on getting caller ID in the
future. I am under the impression that they must have an external DSL
splitter (or filter) for caller ID to function correctly. Is this
true?
|
No, it can be an internal or external splitter, it won't matter to
caller-id as it operates strictly within the LF signals that standard
telephones use. Consider a Caller-id device as if it was just a
standard telephone, so it should be AFTER a splitter/filter, just like
a standard telephone. My preference is to use a single external
splitter for all the phones in the house and take the ADSL signal off
the line before it reaches the DSL splitter.
| Quote: | Same rules for alarm systems and TDD?
|
This is where it gets tough, it all depends on exactly HOW the alarm
system works (I am not sure what a TDD is but will assume its like an
alarm that needs a "clear line" to operate). Some alarms MUST have a
clear line to work, so they intercept the cable coming into the house
and BREAK the line at that point when the alarm is triggered, so they
can guarantee they have a working telephone line that can reach the
exchange. In this case DSL should still work, unless there is
something specific in your Alarm system that says it cannot. I suggest
you contact your Alarm manufacturer to clear this point up, BUT don't
be surprised if the Alarm people say "whats DSL"?
Cheers.................pk. |
|
| Back to top |
|
|
|
|
|
|
FAQ
Memberlist
Register
Profile
Log in to check your private messages
Log in