From: "Leon D. Zetekoff" Received: from [192.168.100.201] (HELO mail.2rosenthals.com) by 2rosenthals.com (CommuniGate Pro SMTP 5.1.3) with ESMTP id 1700445 for os2-wireless_users@2rosenthals.com; Mon, 11 Feb 2008 12:44:35 -0500 Received-SPF: none (secmgr-ny.randr: 64.111.148.240 is neither permitted nor denied by domain of backwoodswireless.net) client-ip=64.111.148.240; envelope-from=wa4zlw@backwoodswireless.net; helo=shana.; Received: from bngr-64-111-148-240-pppoe.dsl.bngr.epix.net ([64.111.148.240] helo=shana.) by secmgr-ny.randr with smtp (Exim 4.43) id 1JOch7-0002u5-Ti for os2-wireless_users@2rosenthals.com; Mon, 11 Feb 2008 12:44:01 -0500 Received: from Unknown ([10.161.51.110]) by shana. id 12237 ; Mon, 11 Feb 2008 12:43:53 -0500 Message-ID: <12237.12.43.53.11.02.2008@shana.> Date: Mon, 11 Feb 2008 12:43:36 -0500 Reply-To: wa4zlw@arrl.net Organization: BackWoods Wireless User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.9) Gecko/20071031 Thunderbird/2.0.0.9 Mnenhy/0.7.5.666 MIME-Version: 1.0 To: OS/2 Wireless Users Mailing List Subject: Re: [OS2Wireless] VOT (very off-topic) References: <114479.22.30.25.10.02.2008@shana.> In-Reply-To: <114479.22.30.25.10.02.2008@shana.> Content-Type: multipart/mixed; boundary="------------080908060701040105000108" X-Spam-Score: 0.1 (/) X-Spam-Report: -1.4 ALL_TRUSTED Passed through trusted hosts only via SMTP 0.1 HTML_TAG_EXIST_TBODY BODY: HTML has "tbody" tag 1.4 SARE_GIF_ATTACH FULL: Email has a inline gif This is a multi-part message in MIME format. --------------080908060701040105000108 Content-Type: multipart/alternative; boundary="------------070703040607090307000507" --------------070703040607090307000507 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Mark...I would NOT use coax. Most telephone cables of recent vintage should have at least two pairs in there and one is usually unused unless you've got a second phone line. So what I would do is check the existing wiring and use the unused pairs and then tap that off with a junction box somewhere. Otherwise either tie a telco cable to the coax and pull it through the wall or just drill a hole and run a cable. That's my $0.02. ;-) leon * Mark Henigan wrote, On 2/10/2008 10:29 PM: >> Mark Henigan wrote: >> >>> A very off-topic question aimed at anyone on the >>> list with telco experience. >>> >>> I have a second phone line to install that only >>> needs to run to one room. There is already an >>> unused coaxial cable from a previous installation >>> by a cable TV company connecting the area of the >>> junction box to that room. The incoming phone >>> line is only a two-wire connection. Would the >>> impedance/capacitance/inductive load of the coax >>> be compatible with a telephone connection? I'm >>> trying to save the trouble of installing >>> additional premises wiring in a house that we >>> rent. Making adapters to allow modular >>> connectors to interface with the coax is no >>> problem for me so long as the characteristics >>> of the line would allow it. >>> >>> TIA, >>> >>> - Mark >>> >>> Mark Henigan >> > Ed Durrant replied: >> Phone lines are usaually 600 Ohm impedance, co-ax on the other hand >> is 50 or 75 Ohm. >> >> I'd try it since it's there - the worst that I would expect is that >> the volume on one or both phone units will be lowered and if that's >> the case you can easily disconnect the cable. Chances are it'll work >> fine. > > Hello Ed: > > I think I need to describe the situation a little > more clearly, given your reply and several others. > > I am talking about a second telephone line, not > splitting a single phone line. The new line is > for my business number. It runs to my home > because I am only in the office with a door that > bears my name one day a week. So, I chose to have > the address listed as the office location but the > installed line at my home where I could have more > efficient access to it. My wife is my assistant > and will be able to use the line for reception of > messages and to schedule appointments. > > The telephone company (AT&T) originally installed > it without installing a connector kit on the > connection box inside a small metal access door > on the side of the house. I called and was able > to get them to send a repair person to install the > connector kit (it includes a screw-down terminal > strip and a modular jack) so that I can install > the premises wiring. > > There is a run of coax from the access box to the > room that I intend to use as an office. It was > installed on the outside of the house and is no > longer than 15 feet. There is no telephone line > to that room. The other telephone jacks in the > house are connected to our home number. This > means that there is no run of cable or telephone > wire to use to pull through new wire. There is > also no point for access to the new line where it > can be easily connected to the electrical power > wiring of the house. Note that the other side of > the wall where the access box is located is the > garage and would allow a surface run of telephone > wiring to a point where I could drill vertically > to enter the wall of the office room. However, > the coax is already installed and enters the room > next to the desk. It will only carry standard > telephony and possibly fax (not a show-stopper if > it is impractical). > > Standard analog telephony uses approximately 40V > connections, although Will makes the point that > the ring tone is at 135V. The use of UTP for the > majority of connections leverages both its > ability to cancel inductive interference and its > differential signal. However, a short run of > coax can avoid induction and can carry signal > through both shielding and center wire. In some > audio frequency applications the shielding of > coaxial cable (admittedly with different > construction and characteristics such as > microphone cable) is intended to carry current; > although this causes ground loops in many > configurations requiring isolation transformers). > I realize the foil shielding of much HF coax is > not a great conductor. However, it should be > adequate from what others (Ed and Jeffrey) have > said. If, as noted by Jeffrey the cable or > connectors are of poor quality or condition, I > can always install a new connector (I have a > compression type installation tool.) or remove > the cable and install telephone cable in its > place. I'd rather avoid the latter since the > cable enters the house of the second floor. > > So, thank you all for your suggestions and > thoughts on this rather confounded question! > I'll try the installation using the coax and > revert to replacing (or adding a run of phone > cable in parallel with) the coax if it does > not work. > > Again many thanks! There is so much knowledge > available on this list! > > - Mark > > Mark Henigan > -- > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > This message is sent to you because you are subscribed to > the mailing list . > To unsubscribe, E-mail to: > To switch to the DIGEST mode, E-mail to > > To switch to the INDEX mode, E-mail to > > Send administrative queries to > > To subscribe (new addresses), E-mail to: > and reply to the confirmation > email. > Web archives are publicly available at: http://lists.2rosenthals.com > > This list is hosted by Rosenthal & Rosenthal, LLC > P.O. Box 281, Deer Park, NY 11729-0281. Non- > electronic communications related to content > contained in these messages should be directed > to the above address. (CAN-SPAM Act of 2003) > > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > > -- *Leon Zetekoff* Proprietor *Work:* 484-335-9920 *Mobile:* 610-223-8642 *Fax:* 484-335-9921 *Email:* wa4zlw@arrl.net *http://www.linkedin.com/in/leonzetekoff* *BackWoods Wireless* 505 B Main Street Blandon, PA 19510 "Bringing Broadband Technology to Rural Areas" See who we know in common Want a signature like this? --------------070703040607090307000507 Content-Type: multipart/related; boundary="------------020403070606060502030706" --------------020403070606060502030706 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Mark...I would NOT use coax. Most telephone cables of recent vintage should have at least two pairs in there and one is usually unused unless you've got a second phone line. So what I would do is check the existing wiring and use the unused pairs and then tap that off with a junction box somewhere. Otherwise either tie a telco cable to the coax and pull it through the wall or just drill a hole and run a cable.

That's my $0.02. ;-)

leon

* Mark Henigan wrote, On 2/10/2008 10:29 PM:
Mark Henigan wrote:

A very off-topic question aimed at anyone on the
list with telco experience.

I have a second phone line to install that only
needs to run to one room. There is already an
unused coaxial cable from a previous installation
by a cable TV company connecting the area of the
junction box to that room. The incoming phone
line is only a two-wire connection. Would the
impedance/capacitance/inductive load of the coax
be compatible with a telephone connection? I'm
trying to save the trouble of installing
additional premises wiring in a house that we
rent. Making adapters to allow modular
connectors to interface with the coax is no
problem for me so long as the characteristics
of the line would allow it.

TIA,

- Mark

Mark Henigan

Ed Durrant replied:
Phone lines are usaually 600 Ohm impedance, co-ax on the other hand is 50 or 75 Ohm.

I'd try it since it's there - the worst that I would expect is that the volume on one or both phone units will be lowered and if that's the case you can easily disconnect the cable. Chances are it'll work fine.

Hello Ed:

I think I need to describe the situation a little
more clearly, given your reply and several others.

I am talking about a second telephone line, not
splitting a single phone line.  The new line is
for my business number.  It runs to my home
because I am only in the office with a door that
bears my name one day a week.  So, I chose to have
the address listed as the office location but the
installed line at my home where I could have more
efficient access to it.  My wife is my assistant
and will be able to use the line for reception of
messages and to schedule appointments.

The telephone company (AT&T) originally installed
it without installing a connector kit on the
connection box inside a small metal access door
on the side of the house.  I called and was able
to get them to send a repair person to install the
connector kit (it includes a screw-down terminal
strip and a modular jack) so that I can install
the premises wiring.

There is a run of coax from the access box to the
room that I intend to use as an office.  It was
installed on the outside of the house and is no
longer than 15 feet.  There is no telephone line
to that room.  The other telephone jacks in the
house are connected to our home number.  This
means that there is no run of cable or telephone
wire to use to pull through new wire.  There is
also no point for access to the new line where it
can be easily connected to the electrical power
wiring of the house.  Note that the other side of
the wall where the access box is located is the
garage and would allow a surface run of telephone
wiring to a point where I could drill vertically
to enter the wall of the office room.  However,
the coax is already installed and enters the room
next to the desk.  It will only carry standard
telephony and possibly fax (not a show-stopper if
it is impractical).

Standard analog telephony uses approximately 40V
connections, although Will makes the point that
the ring tone is at 135V.  The use of UTP for the
majority of connections leverages both its
ability to cancel inductive interference and its
differential signal.  However, a short run of
coax can avoid induction and can carry signal
through both shielding and center wire.  In some
audio frequency applications the shielding of
coaxial cable (admittedly with different
construction and characteristics such as
microphone cable) is intended to carry current;
although this causes ground loops in many
configurations requiring isolation transformers).
I realize the foil shielding of much HF coax is
not a great conductor.  However, it should be
adequate from what others (Ed and Jeffrey) have
said.  If, as noted by Jeffrey the cable or
connectors are of poor quality or condition, I
can always install a new connector (I have a
compression type installation tool.) or remove
the cable and install telephone cable in its
place.  I'd rather avoid the latter since the
cable enters the house of the second floor.

So, thank you all for your suggestions and
thoughts on this rather confounded question!
I'll try the installation using the coax and
revert to replacing (or adding a run of phone
cable in parallel with) the coax if it does
not work.

Again many thanks!  There is so much knowledge
available on this list!

- Mark

Mark Henigan
--

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--
Leon Zetekoff
Proprietor
Work: 484-335-9920
Mobile: 610-223-8642
Fax: 484-335-9921
 Email: wa4zlw@arrl.net
http://www.linkedin.com/in/leonzetekoff
 BackWoods Wireless
 505 B Main Street
 Blandon, PA 19510
"Bringing Broadband Technology to Rural Areas"
See who we know in common Want a signature like this?
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