A design layout record (DLR) or circuit layout record (CLR) is used in the
telecommunication
Telecommunication, often used in its plural form or abbreviated as telecom, is the transmission of information over a distance using electronic means, typically through cables, radio waves, or other communication technologies. These means of ...
industry to describe the detailed design path of a completed
circuit, including all equipment and network components from one end (often referred as A-Loc or A-end) of the circuit to the other (Z-Loc or Z-end).
It may be detailed enough to include location, floor, row, rack, panel and port for each circuit component or it may simply refer to another previously engineered circuit. A DLR may describe an end-to-end circuit that comprises physical or
virtual circuit
A virtual circuit (VC) is a means of transporting data over a data network, based on packet switching and in which a connection is first established across the network between two endpoints. The network, rather than having a fixed data rate reser ...
s. As an example, a physical facility would include a panel, rack and port, while a virtual facility may be a channel on a
channelized circuit, such as a
T1 on a previously engineered
DS3.
Explanation
There are two parts to a circuit:
# Physical design/path
# Logical design/path
The design team is responsible to find the best, lowest-cost path for the circuit being designed, and get the physical line provisioned. When their role is complete, the order is passed to another team who take care of establishing logical design and accessibility of the circuit. Every network element that is part of the circuit needs to be built and checked. The DLR provides a systematic way to identify the network elements and their attributes. With the aid of the DLR, a team installs the circuit and tests it to check that it meets the customer's specifications.
There are many ways to prepare a DLR. Many include:
* Network elements, port and channel assignment
*
Cross connects: hard and soft
* Rings
* Location codes for sites where equipment is housed
*
IP address
An Internet Protocol address (IP address) is a numerical label such as that is assigned to a device connected to a computer network that uses the Internet Protocol for communication. IP addresses serve two main functions: network interface i ...
, slots for network elements and other fine details as such
See also
*
Electronic circuit design
References
Telecommunications engineering
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