Does LEC usally provide a CSU?

[seedofconspiracy]

Or is it typically up to the customer? Just wondering. Thanks.

[Rich Piehl]

Post by seedofconspiracy
Or is it typically up to the customer? Just wondering. Thanks.

I've seen it both ways. In what kind of application?

Take care,
Rich

God bless the USA

[seedofconspiracy]

On Sep 17, 2:26 pm, Rich Piehl

Post by Rich Piehl

Post by seedofconspiracy
Or is it typically up to the customer? Just wondering. Thanks.

I've seen it both ways. In what kind of application?
Take care,
Rich
God bless the USA
--
I reject your reality
and substitute my own.
-----Adam Savage

Thanks. We're using Global Crossing as our IXC. They interface with
our LEC (ILEC) AT&T. The application is voice/PBX. Currently, our
smartjacks are in our server room with a ~7ft ethernet cable going
directly to our PBX (no CSU in the middle). It's a very short
distance and as far as I'm reading, somewhat abnormal in the fact that
the smartjack is in the same room as the PBX. We've been having
chronic d-channel failures in the past few months (4 times so far,
length of outage varies, on both PRIs, none of which happened before
we moved from XO Communications to Global Crossing). No one can
figure out what is causing the problem.

In any case, I was just making a case to add a couple CSU's to the
budget (it may or may not fix the problem mentioned above). As far as
I see, they may not be necessary, but it's somewhat highly
recommended. Similar to placing a UPS in between your server and the
wall for power conditioning.

[Rich Piehl]

Post by seedofconspiracy
On Sep 17, 2:26 pm, Rich Piehl

Post by Rich Piehl

Post by seedofconspiracy
Or is it typically up to the customer? Just wondering. Thanks.

I've seen it both ways. In what kind of application?
Take care,
Rich
God bless the USA
--
I reject your reality
and substitute my own.
-----Adam Savage

Thanks. We're using Global Crossing as our IXC. They interface with
our LEC (ILEC) AT&T. The application is voice/PBX. Currently, our
smartjacks are in our server room with a ~7ft ethernet cable going
directly to our PBX (no CSU in the middle). It's a very short
distance and as far as I'm reading, somewhat abnormal in the fact that
the smartjack is in the same room as the PBX. We've been having
chronic d-channel failures in the past few months (4 times so far,
length of outage varies, on both PRIs, none of which happened before
we moved from XO Communications to Global Crossing). No one can
figure out what is causing the problem.
In any case, I was just making a case to add a couple CSU's to the
budget (it may or may not fix the problem mentioned above). As far as
I see, they may not be necessary, but it's somewhat highly
recommended. Similar to placing a UPS in between your server and the
wall for power conditioning.

Another aspect of the CSU is if there is a large distance between the
smart jack and the equipment some CSU's can provide a degree of
amplification. Similarly if the signal is too hot a CSU can be set to
attenuate it.

Take care,
Rich

God bless the USA

[Doug McIntyre]

Post by seedofconspiracy
Or is it typically up to the customer? Just wondering. Thanks.

No, its typically up to the customer.

Most gear has built in CSU/DSU now-a-days. (data or voice).

[seedofconspiracy]

Post by Doug McIntyre

Post by seedofconspiracy
Or is it typically up to the customer? Just wondering. Thanks.

No, its typically up to the customer.
Most gear has built in CSU/DSU now-a-days. (data or voice).

Thanks. That definitely helps.

[Robert Bonomi]

Post by seedofconspiracy
Or is it typically up to the customer? Just wondering. Thanks.

WHAT COUNTRY??

In the U.S. the ILEC no longer provides _any_ CPE gear. CLEC's may.

[seedofconspiracy]

Post by Robert Bonomi

Post by seedofconspiracy
Or is it typically up to the customer? Just wondering. Thanks.

WHAT COUNTRY??
In the U.S. the ILEC no longer provides _any_ CPE gear. CLEC's may.

Sorry. I keep forgetting that other countries exist. Typical USA
mindset ;-). Thanks for your input. I think you hit the nail on the
head, as you seem confident in your answer. We're dealing with an
IXC, and they deal with the ILEC. I was hoping to somehow get a
couple CSUs for free from the ILEC. Looks like I'll be shelling out
for them myself!

[Robert Bonomi]

Post by seedofconspiracy

Post by Robert Bonomi

Post by seedofconspiracy
Or is it typically up to the customer? Just wondering. Thanks.

WHAT COUNTRY??
In the U.S. the ILEC no longer provides _any_ CPE gear. CLEC's may.

Sorry. I keep forgetting that other countries exist. Typical USA
mindset ;-).

Sorry for yelling, but for the question you asked, the 'country' is ritial.
In most of the rest of the world, the telco _does_ supply the CSU, or
maybe the CSU/DSU combo, and you _have_ to use what they provide.

Post by seedofconspiracy
Thanks for your input. I think you hit the nail on the
head, as you seem confident in your answer. We're dealing with an
IXC, and they deal with the ILEC. I was hoping to somehow get a
couple CSUs for free from the ILEC. Looks like I'll be shelling out
for them myself!

A stand-alone CSU will be _very_ hard to find. A combination CSU/DSU
is considerably more common.

Whether or not you 'need' one, or even "can use one" depends on the
interface available on the equipment you're going to hook up to it.

Virtually all modern telephony gear has the CSU/DSU functionality built in.

you_cannot_ just add an outboard unit 'in series' with the built in one.

[Doug McIntyre]

Post by Robert Bonomi
A stand-alone CSU will be _very_ hard to find. A combination CSU/DSU
is considerably more common.
Whether or not you 'need' one, or even "can use one" depends on the
interface available on the equipment you're going to hook up to it.
Virtually all modern telephony gear has the CSU/DSU functionality built in.
you_cannot_ just add an outboard unit 'in series' with the built in one.

Not very hard. Adtran CSU ACE series. Very current devices.

Designed to be inserted ahead of another T1 interface to introduce
a test interface (if the other gear doesn't provide one), possibly
reduce jitter, and provide a more solid signal if needed.

https://www.adtran.com/adtranpx/Doc/0/RTR9HU4ED6AKV5ONNFQ2OAGE77/61204025L1-1B.pdf

But, most T1 interfaces on CPE gear itself are pretty capable as it is,
most gear will let you pull ANSI PMs, but if it doesn't then the Adtran
unit will step in and fulfill those functions.

This is more insurance as the OP follows up with. $400 for a "t1 line
conditioner" that might fry from a zap vs. $x thousands for an interface
card for such-and-such gear might be cheap insurance.

But I don't think for a 7' run from the smartjack to the CPE, its going
to do a whole lot.