Unless you're going for some kind of distance record, standard Cat5
will
work
without any issue on any modern installation. As I said, I'm pretty
sure
(not 100%, but close) that the T1 specification is only Cat3, since
it's
standard BellCore wire and they don't run your T1 loops (which
Ever looked at the underground cable in the street outside your
building? If it's more than 20 years old, it's probably
paper-insulated
gel-filled cable, with an _extremely_ thin amount of insulation
between
the conductors and _zero_ insulation between the pairs. T1s seem to
work
just fine
On Monday 24 April 2006 12:39, Alexander Lopez wrote:
And if you don't believe the 'high-end' part brush up against a 66-block
while your well grounded, you will be singing in the high-end!!! At
that voltage I think the differential created by the twists would cancel
anything including small
I've never bothered to check to see if cat5 cables use the appropriate
mating twisted pairs or not. Since the pinouts are different for cat5
vs
T1 cables, I'd have to guess a single strand is used from two
different
twisted pair groups. That wouldn't be cool, but in short runs it
probably
Alexander Lopez wrote:
6-8 spans? That's the number that I have been trying to get, and why the
limit. Is it X-talk?
I think so. I've had clients before who had to have spans brought in via
different routes even though the pairs in the underground cable were in
otherwise acceptable condition.
On Monday 24 April 2006 13:30, Michael Collins wrote:
IIRC, standard Ethernet uses pairs 12 and 36. The color scheme on
568B is 12 = white/orange pair, 36 = white/green pair
Most Ethernet cables then have the white/blue pair on 45, and
white/brown on 78.
Close. 10/100mbps Ethernet uses
]
To: Asterisk Users Mailing List - Non-Commercial Discussion
asterisk-users@lists.digium.com
Sent: Monday, April 24, 2006 9:27 AM
Subject: Re: [Asterisk-Users] Re: Shielding of T1/E1 cables WAS RE:
Pinoutsfor T1/E1 crossover
Andrew Kohlsmith wrote:
Insulation (especially such thin insulation) does
Andrew Kohlsmith wrote:
On Monday 24 April 2006 13:30, Michael Collins wrote:
IIRC, standard Ethernet uses pairs 12 and 36. The color scheme on
568B is 12 = white/orange pair, 36 = white/green pair
Most Ethernet cables then have the white/blue pair on 45, and
white/brown on 78.
Close.
On Monday 24 April 2006 16:13, Rich Adamson wrote:
A 'real' T1 cable would use a twisted pair for pins 1 2 and another
twisted pair for 4 5. Looks like a typical cat5 straight-through
cable uses twisted pairs straight across pins 1 through 8.
Nope. A cable wired for ethernet and a cable
Andrew Kohlsmith wrote:
On Monday 24 April 2006 16:13, Rich Adamson wrote:
A 'real' T1 cable would use a twisted pair for pins 1 2 and another
twisted pair for 4 5. Looks like a typical cat5 straight-through
cable uses twisted pairs straight across pins 1 through 8.
Nope. A cable wired
10 matches
Mail list logo
