Splitterless ADSL2 is here

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richms

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#410964 30-Nov-2010 01:56

The SDP isnt a demarc tho, they will install it anywhere on the internal wiring, totally negating any benifit of it. A demarc should be installed only where the telecom cable enters the premisis, preferably on the outside of the property.

Richard rich.ms

antoniosk

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#410967 30-Nov-2010 05:38

richms: The SDP isnt a demarc tho, they will install it anywhere on the internal wiring, totally negating any benifit of it. A demarc should be installed only where the telecom cable enters the premisis, preferably on the outside of the property.

Not quite.... the wiring guidelines are that the copper from Telecom goes into the SDP, and the SDP bridges into the premises wiring.

It's a physical break from the Telecom network.

The SDP doesn't HAVE to be where the old master socket is though.

For example, I have a master socket by the front door, and extensions in my office upstairs. I COULD move the SDP to the office and reticulate inside the house from there (in fact I prefer to)...

But the demarc is the SDP.

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Antoniosk

Bung

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#410977 30-Nov-2010 07:37

Steve Biddle's blog posting on the SDP showed it apparently reusing existing (dodgy?) internal cable to locate inside the house but his diagrams include an ETP. AFAIK an ETP is the demarcation if it is fitted. How can "network" wiring coexist in the customer's cabling?

It's the 1st time I've noticed that the SDP uses screw terminals for the telephone connections. That seems a step backwards as far as reliability goes.

cyril7

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#410980 30-Nov-2010 07:48

It was a chorus decision to use screw terminals but that does not preclude the installer using Scotch locs to termiate the line. And yes the sdp is intended as the demarc, withh a clean line installed to the ETP.

Cyril

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#410983 30-Nov-2010 07:55

Bung:
It's the 1st time I've noticed that the SDP uses screw terminals for the telephone connections. That seems a step backwards as far as reliability goes.

I was surprised they had gone for screw terminals as well. Even though designed for use indoors and we only need to look at the corrosion that occurs in older BT jacks in NZ's damp houses to realise that exposed copper is a bad thing. Scotch lok connectors are probably a preferable option.

It would have been far more logical to include a punchdown terminal block like the Signet ST2206 that cyril7 designed.

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