The full name of OLT is optical line terminal, which is a device which serves as the service provider endpoint of a passive optical network. It provides two main functions:
1.to perform conversion between the electrical signals used by the service provider’s equipment and the fiber optic signals used by the passive optical network.
2.to coordinate the multiplexing between the conversion devices on the other end of that network (called either optical network terminals or optical network units).
An OLT can have several ports, and each port can drive a single PON network with split ratios or splitting factors of around 1:32 or 1:64, meaning that for each port on the OLT, up to 32 or 64 ONUs at customer sites can be connected although this depends on the PON standard the OLT and the PON network supports. XGS-PON networks support split ratios of up to 1:128. An OLT with 16 ports can support up to 2048 users assuming a split ratio of 1:128 for every port.
Components of OLT
OLT generally consists of the following parts:
1. Control board (also called main control board or super control unit). Generally, an OLT has two boards, one for the master and one for the backup.
2. DC power supply board. Generally, there are two boards, one for the master and one for the backup.
3. Fan unit. It’s mainly used to dissipate heat and monitor the environment.
4. Service frame.
5. Other uplink boards.
OLT include the following features:
1. A downstream frame processing means for receiving and churning an Asynchronous Transfer Mode cell to generate a downstream frame, and converting a parallel data of the downstream frame into a serial data thereof.
2. A wavelength division multiplexing means for performing an electro/optical conversion of the serial data of the downstream frame and performing a wavelength division multiplexing thereof.
3. An upstream frame processing means for extracting data from the wavelength division multiplexing means, searching an overhead field, delineating a slot boundary, and processing a physical layer operations administration and maintenance (PLOAM) cell and a divided slot separately.
4. A control signal generation means for performing a media access control (MAC) protocol and generating variables and timing signals used for the downstream frame processing means and the upstream frame processing means.
5. A control means for controlling the downstream frame processing means and the upstream frame processing means by using the variables and the timing signals from the control signal generation means.
Types of IDXLINK OLT
IDXLINK OLT includes GPON and EPON OLT. It supports CLI, Telnet, WEB, SNMP V1/V2/V3, SSH2.0. There are 4 port GPON OLT, 8 port GPON OLT and 16 port GPON OLT. EPON OLT is also divided into 4/8/16 ports. They adopt compact design and can be applied to various scenarios. It has carrier-class security protection and supports dynamic routing protocol RIP & SPF to ensure network security. It provides multiple service management such as Internet access, WiFi setting, VoIP, CATV, security management, etc.
Application of OLT
The OLT device coordinates with different types of ONU to achieve all kinds of access networks such as FTTC, FTTH, FTTO, FTTM, etc. We could provide different strategies of the deployment and suitable solutions according to clients’ demanding, different services and regions.
