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|Product Name:||GPON Optical Line Terminal||Standard:||ITU-T G.984|
|Dual Power Supply:||AC And DC||AC Supply Input:||100～240V，47～63Hz|
|DC Supply Input:||-36V～-75V||PON Port:||8 Ports|
|Ethernet Port:||8 GE FX And 8xGE TX||SFP Module:||2x10GE SFP+|
GPON OLT Optical Line Terminal For ONU With 8 PON 8 Gigabit Ethernet Ports
How OLT To Distinguish Uplink Data From Different ONT ?
The downlink data is simple for ONT because they are broadcast down from OLT, ONT only need to apart the information for itself from all information. However, the upstream flow is different, because the upstream flow will meet problem of information conflict .
The former PON technology adopted TDMA for uplink , the time have to be divided then ONT can distinguish the uploaded data. So how ONT know to send the data? And how it know how long will it take to send the data? This requires an agreement between OLT and ONT to achieve the above functions. What will happen if the OLT assign a long time for the ONT? If the amount of data sent by ONT is relatively large, that is to say, the bandwidth of ONT is relatively large. And the ONT start to send data on the allocated time. However, it will waste the bandwidth when the ONT do not have data to send during the allocate time so other ONT which has large data to send can not use the same time . This situation will inevitably bring rising costs. So GPON allocate bandwidth based on T-CONT.
With T-CONT, OLT is able to allocate bandwidth based on T-CONT. Of course, one ONT has multiple T-CONT, the benefits is it is able to allocate different type of T-CONT according to the different requirements of the business bandwidth. So T-CONT should have different types, currently there are four basic types of T-CONT: Fix, Assure, Not Assure and Best Effort (Max). They are used to represent different bandwidth allocation policies. What is the difference between them? To describe the difference, DBA has to be mentioned and please refer to another article in our website, Dynamically Bandwidth Assignment of OLT.
Satisfy ITU -T standard
MAC Black Hole
4K VLAN entries
|Spanning tree protocol|
IEEE 802.1D Spanning Tree Protocol (STP)
Bi-directional bandwidth control
|Security features||User security|
Anti-DOS attack(such as ARP,Synflood, Smurf, ICMP attack), ARP detection, worm and Msblaster worm attack
User-based MAC and ARP traffic examination
|IP routing||IPv4||ARP Proxy,DHCP Relay,DHCP Server,Static route|
ICMPv6,ICMPv6 redirection,DHCPv6,ACLv6,Configured Tunnel,6to4 tunnel
Standard and extended ACL
Rate-limit to packet sending/receiving speed of port or self-defined flow and provide general flow monitor and two-speed tri-color monitor of self-defined flow
IGMPv1/v2/v3 ,IGMPv1/v2/v3 Snooping
EAPS and GERP (recover-time <50ms)
FlexLink (recover-time <50ms)
VRRP host backup
Command-line interface(CLI), Console, Telnet and WEB configuration
Product Parameters Of FA-GOLT8608
|Ports||4/8*PON port,8*GE FX+8*GE TX,2*10GE SFP+|
|Power redundancy||Dual power supply. Can be double AC, double DC or AC+DC|
|Weight (in maximum configuration)||≤3kg|