|
|
|
|
Joined: Dec 2009
Posts: 105
Member
|
|
Member
Joined: Dec 2009
Posts: 105 |
If a CSU only provides conditioning and some protection for the CPE how nesscessary are they when the Telco uses fiber to deliver the PRI?
|
|
|
Visit Atcom to get started with your new business VoIP phone system ASAP
Turn up is quick, painless, and can often be done same day.
Let us show you how to do VoIP right, resulting in crystal clear call quality and easy-to-use features that make everyone happy!
Proudly serving Canada from coast to coast.
|
|
|
|
Joined: May 2007
Posts: 5,059 Likes: 6
Moderator-1A2, Cabling
|
|
Moderator-1A2, Cabling
Joined: May 2007
Posts: 5,059 Likes: 6 |
Sometimes the CPE manufacturer requires a CSU, regardless.
What equipment are you connecting to, and with what service?
Sam
Last edited by Silversam; 11/19/12 03:49 PM.
"Where are we going and why are we in this hand basket?"
|
|
|
|
|
Joined: Dec 2009
Posts: 105
Member
|
|
Member
Joined: Dec 2009
Posts: 105 |
Samsung OfficeServ to a PRI
|
|
|
|
|
Joined: May 2007
Posts: 5,059 Likes: 6
Moderator-1A2, Cabling
|
|
Moderator-1A2, Cabling
Joined: May 2007
Posts: 5,059 Likes: 6 |
Who is providing the PRI? I don't know anything about Samsung OfficeServ, but I'm sure other folks on the board do, let's see if anyone chimes in....
Sam
"Where are we going and why are we in this hand basket?"
|
|
|
|
|
Joined: Oct 2010
Posts: 250
Member
|
|
Member
Joined: Oct 2010
Posts: 250 |
If the telco uses fiber to deliver the PRI then it must be changed back to an electrical signal before it is handed off to the CSU. This is accomplished by the Telco mux, located on or off the customer premise. Ive seen installations where the mux is at the customers premises and all they wanted was the electrical signal to go straight into their CSU's. I've also seen installations where even though the mux was at the customer customers premise they wanted to have the electrical signal from the telco terminated in a DSU type device and then connect to the CSU. They did this mostlry for testing and trouble isolation purposes I guess.
Forty six years and still fascinated with Telecommunications!
|
|
|
|
|
Joined: Oct 2010
Posts: 250
Member
|
|
Member
Joined: Oct 2010
Posts: 250 |
"If a CSU only provides conditioning and some protection for the CPE how nesscessary are they when the Telco uses fiber to deliver the PRI?"
The CSU is loopable either towards the telco network or the CPE so it is needed for testing and line isolation and as an interface device.
Forty six years and still fascinated with Telecommunications!
|
|
|
|
|
Joined: Jan 2005
Posts: 15,412 Likes: 18
Moderator-Vertical, Vodavi, 1A2, Outside Wire
|
|
Moderator-Vertical, Vodavi, 1A2, Outside Wire
Joined: Jan 2005
Posts: 15,412 Likes: 18 |
I thought that CSU functionality, whether provided by an external CSU or through the capabilities of the PRI hardware itself, was mandated by the FCC. I don't think that this is optional since service providers are required to maintain certain levels of troubleshooting abilities. If that last link is missing, then they can't be held responsible for not upholding their end of the deal.
I will admit that it seems a bit silly, since about 95% of the circuit failures are on the outside where the fault can be detected by the telco's Adtran card anyway. Frankly, I've seen CSUs do more harm than good in many instances.
Ed Vaughn, MBSWWYPBX
|
|
|
|
|
Joined: Oct 2010
Posts: 250
Member
|
|
Member
Joined: Oct 2010
Posts: 250 |
You are correct Sir! If I said it wrong I apologize. The DSU was made optional. The CSU in some form must be at the termination point of the circuit.
Forty six years and still fascinated with Telecommunications!
|
|
|
|
Forums84
Topics94,570
Posts640,208
Members49,872
| |
Most Online5,661
May 23rd, 2018
|
|
|
0 members (),
69
guests, and
98
robots. |
|
Key:
Admin,
Global Mod,
Mod
|
|
|
|
|
|
