A design layout record (DLR) or circuit layout record (CLR) is used in the
telecommunication
Telecommunication is the transmission of information by various types of technologies over wire, radio, optical, or other electromagnetic systems. It has its origin in the desire of humans for communication over a distance greater than tha ...
industry to describe the detailed design path of a completed
circuit
Circuit may refer to:
Science and technology
Electrical engineering
* Electrical circuit, a complete electrical network with a closed-loop giving a return path for current
** Analog circuit, uses continuous signal levels
** Balanced circu ...
, 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 established within the network between two endpoints. The network, rather than having a fixed data rate reservation ...
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
Channelized in a telecommunications environment means that the line that communications have been transmitted over contains more than one message thread, separated in some fashion.
Typical channelization methods include packetizing, frequency-d ...
, 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 connect
A digital cross-connect system (DCS or DXC) is a piece of circuit-switched network equipment, used in telecommunications networks, that allows lower-level TDM bit streams, such as DS0 bit streams, to be rearranged and interconnected among higher ...
s: 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 connected to a computer network that uses the Internet Protocol for communication.. Updated by . An IP address serves two main functions: network interface ident ...
, slots for network elements and other fine details as such
See also
*
Electronic circuit design Electronic circuit design comprises the analysis and synthesis of electronic circuits.
Methods
To design any electrical circuit, either analog or digital, electrical engineers need to be able to predict the voltages and currents at all places withi ...
References
Telecommunications engineering
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