Inside Wiring – typically involves an Extended Demarc
This term is greatly misunderstood.
"Extended demarc" typically means that the LEC or the Customer
has extended the MPOP beyond the Smart Jack.
There are actually two demarc's .
. . the LEC demarc (the MPOP) and the IXC demarc (the SDP).
Howewer, the MPOP is the default demarc.
Since an RJ48x biscuit is almost always used - almost
all installs are extended demarc's.
The LEC or the Customer typically extends
the MPOP. This is because the Smart
Jack usually sits in a wiring closet, and is not readily available or visible in
day-to-day operations. A small
biscuit mounted on the wall of a computer room is much less obtrusive and is
more convenient when connecting up user devices such as routers and PBX units.
These types of demarc extensions by the LEC or Customer may be only
several feet, or several hundred feet.
An estimated 90% of circuits use this
type of extended demarc. Therefore,
there are very few installs without extended demarc's.
There is another line of thinking, that
views the 10 or 20 feet within the smart jack as a normal install, and even though the LEC has extended the demarc to a
wall jack near the Smart Jack. This
is a common fallacy, where only installs to far-away equipment are considered
extended demarc's. In actuality,
one foot of cable between a Smart Jack and an RJ48x biscuit is an extended
demarc. Even a 1-inch cable would
technically still be considered an extended demarc! Regardless, anything over 20-30 ft is also an extended demarc
- and must be aquired by the customer through the proper channels.
For optimum performance, use minimum lengths of V.35
This demarc extension can be done the LEC,
the Customer, or even the IXC.
FTS2001 On-Premises Wiring
Each IXC can also offer extended demarc
services, or "Inside Wiring", via 3rd party contractors.
Currently most IXC's sends these tickets to other vendors.
But if the
customer wishes to have the IXC perform the inside wiring, this must be disclosed
at the time of the order.
The cable that comes with the CSU/DSU will be used to plug into the RJ48x
biscuit. The standard lengths that
come in the box are as follows :
These are the lengths that come in
the box with the CSU/DSU's. Unless
contracted to perform inside wiring - the provider is not required to supply longer
cables that this, and typically does not. Keep
in mind that these are the cables that connect to the RJ48x biscuit.
When extended wiring is required, it is usually the wire that runs
between the Smart Jack and the biscuit. Therefore,
this cable is typically supplied by the LEC or by the customer, and in some
cases by the IXC's contracting vendors.
Normally, the line between the Wall
Mounted biscuit and the CSU/DSU is not extended, since it is preferable to have
the biscuit reside near the customer's equipment. Therefore, the line between the Smart Jack and the biscuit is
preferred for extension.
the SDP, all cables are supplied by the customer.
This includes V.35 cables for router connections, as well as CSU-to-PBX