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H18EDD-0402B Ethernet Demarcation Device


H18EDD-0402B is a carrier-class Ethernet demarcation device produced by Beijing Huahuan Electronics Co., Ltd. On the basis of high-performance L2 switch service, the device provides convenience of maintenance and deployment, multi-service support, carrier-class OAM management, reliable protection mechanism, QoSpolicy, security mechanism, and other service optimization measures. Meanwhile,it features excellent extensibility and reliability.

H18EDD-0402B device provides two GE optical ports as NNIs, four GE electrical ports as UNI ports, and one FE electrical port as out-of-band management port, and its CONSOLE port is RS232.H18EDD-0402B supports the latest carrier Ethernet attributes and is compatible with IEEE, ITU, and MEF standards. The carrier-class OAM has enhanced network management capacity and meet the operator’s requirements for comprehensive and powerful capacity of monitoring and management. QoS function has extended the scope of carrier Ethernet, applying it to real-time service, i.e. voice and video. S-VLAN ID is used to implement VLAN extensibility and provide service for hundreds of enterprise users and hundreds of thousands of individual users.


²  UNI supports 10/100M/1000M auto-negotiation and manual setting of10/100M/1000M full-duplex/half-duplex, and AUTO-MDIX (Media Dependent InterfaceCrossover); NNI supports auto-negotiation mode and 100/1000M full-duplex mode.

²  IEEE802.1Q VLAN, IEEE802.1ad VLAN (at most 4094 VLAN entries).

²  EFM(Ethernet in the First Mile), CFM(Connectivity Fault Management),SLA(Service Level Agreement), and other carrier-class OAM management.

²  STP/RSTP/MSTP(Spanning Tree Protocol/ Rapid Spanning Tree Protocol/Multiple Spanning Tree Protocol).

²  Link aggregation (manual LAG and static LACP(Link Aggregation ControlProtocol)).

²  ELPS(Ethernet Linear Protection Switching).

²  ERPS(Ethernet Ring Protection Switching).

²  QoS function based on port speed limit, port mirror, priority trust, flowclassification, flow policy, priority mapping, and queue scheduling.

²  Interface protection.

²  Jumbo frame setting (maximum 9720 bytes).

²  Flow control.

²  LFP(Link Fault Pass).

²  DDM(Digital Diagnosis Monitoring).

²  MAC address forwarding control.

²  IEEE 802.1X authentication.

²  ACL(Access Control List).

²  Broadcast storm repression.

²  Remote in-band monitoring management.

²  Remote power failure alarm.

²  EzView network management, SNMP(Simple Network Management Protocol), andCLI.

²  NTP (Normal Temperature and Pressure) and RMON(Remote NetworkMonitoring).

²  Upgrade of software through TFTP(Trivial File Transfer Protocol).


10/100/1000Base-Tx  interface

Interface  specifications

Complying with IEEE 802.3, IEEE-802.3u, IEEE 802.1Q, and IEEE 802.1p

Interface rate


Operation mode

Auto-negotiation, 1000M full-duplex, 1000M  half-duplex, 100M full-duplex, 100M half-duplex, 10M full-duplex, 10M  half-duplex

Interface connector

RJ-45 socket

Interface number

5: 4 UNIs and 1 SNMP management port

Frame length

The maximum frame length can be set to 2000 or 9720  bytes

1000Base-Fx interface

Interface  specifications

Complying with IEEE 802.3, IEEE-802.3z, IEEE 802.1Q,  IEEE 802.1p, IEEE802.1ad, IEEE802.1d, IEEE802.1w, IEEE802.3ad, IEEE802.3ah,  IEEE802.1ag, and Y1731

Interface rate


Operation mode

Auto-negotiation, 1000M full-duplex, 100M full-duplex

Interface connector

SFP socket

Interface number


Transmission  wavelength and distance

Determined by optical  module

Power voltage


DC -48V (-36V~-72V)

AC ~220V(AC85V~265V)

Power consumption

Power consumption


Operation environment

Operation temperature

-5°C ~55°C

Storage temperature

-40°C ~70°C

Relative humidity

5%~85%RH  (non-condensing)

Chassis size


W×D×H(mm): 170×282×44

Device weight



Typical Application

Standard Compliance


Standards and Protocols


IEEE 802.1Q ,IEEE802.1ad

Link aggregation

S-MAC,D-MAC,S-MAC and D-MAC,manual LAG and static LCAP  modes.


Single  ring, intersecting rings and tangent ring


1:1  bidirectional switching, retertive and non-retertive modes


Port speed limit,port mirroring,priority trust,flow  classification,flow policy,priority mapping,queue scheduling

Flow control

Half-duplex/full-duplex, back pressure and IEEE802.1x


Analyzing monitoring data of optical module


IEEE 802.3ah


Continuity check function,LB,LT


IEEE 802.1ab


Based on port, IP ACL and MAC ACL

Storm suppression

Unkown unicast flow, unkown multicast flow and broadcast  flow


Established by IETF(internet engineering task force)


Client/server model


Support NTP client mode,can synchronize time with NTP  server.