ALTO PROCESSORS

BL3458 Quad GPON Optical Line Terminal OLT Controller

BroadLight’s BL3458 is a highly integrated four-port Gigabit PON Optical Line Terminal (OLT) System-on-Chip (SoC). The BL3458 SoC integrates GPON Media Access Control (MAC) functions, GPON protocol management, Ethernet MAC functions, and an embedded host CPU subsystem. Along with PONJacket, the comprehensive OLT software development package, with a complete set of device drivers, designers can realize quick and low-risk time to market development of high density ITU-T G.984 compliant OLT equipment.

BL3458 supports a programmable Dynamic Bandwidth Allocation mechanism (DBA). Seamless inter-connectivity with optical transceivers, Ethernet switches or Network Processors and DDR2 memory which significantly reduces complexity, power and cost during high density OLT designs.

BL3458 is the industry's highest density and lowest power OLT device.

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Block Diagram

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Application Diagram

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FEATURES

8 port line card for chassis based OLT

Up to 60 km logical reach

Quad-channel GPON OLT ITU-T G.984 MACs

Up to 128 ONTs per PON link

Up to 1024 Alloc-IDs per PON link

Up to 4096 Port-IDs per PON

Flexible Ethernet/GPON interworking

Upstream/downstream Forward Error Correction (FEC)

Integrated 128-bit AES encryption engine for enhanced security

TDM up to 155 Mbps over GEM

PON-aware QoS

Priority queues

Priority discard and flow control

GEM Port Mapping per p-bit

Embedded dual core MIPS32 4KEc controller

Seamless SFF/SFP optical transceiver interface

In-band and out-of-band OAM&P

TR-156 and OMCI support

SPECIFICATIONS

Survivability and Reliability

Redundancy/Protection mechanism

Destructive and non-destructive Rogue ONU detection and prevention

Diagnostics and manufacturing tools

Physical

35x35mm/1.37x1.37” TEBGA-768

1.2V, 1.8V, 2.5V

1W per OLT port, 4W total typical

40°C to +85°C / -40°F to +185°F

GEM Interface

155 Mbps clear channel TDM

Optical Interface

Internal BCDR and SerDes

2488 Mbps downstream, 1244 Mbps upstream Transceiver diagnostics and management

Flexible optical transceiver control interfaces to support transceivers from multiple vendors

Network Interfaces

Gigabit Ethernet

4x 2.5 Gbps SGMII

Configurable enable/disable MDIO interface

Configurable custom tag support

Memory Interface

Embedded 200MHz DDR2 controller

Glueless interface to industry standard DDR memories