RICi-622GE Gigabit Ethernet over 2 x STM-4/OC-12 Network Termination Unit
RICi-622GE is a state-of-the-art network termination unit (NTU) that bridges between Gigabit Ethernet networks andSTM-4/OC-12
networks, providing simple, efficient, and cost-effective Gigabit Ethernet connectivity over SDH/SONET
networks. The device offers a migration path for connecting future-ready IP devices to existing SDH/SONET networks at up to 1.2
Gbps access rates.
RAD RICi-622GE complies with RADs unique set of EtherAccessTM features. This feature set provides services and carrier
backhaul applications over low and high-speed SDH/SONET and PDH circuits, from fractional and full E1/T1 or E3/T3 over STM-
1/OC-3c or STM-4/OC-12 to Gigabit Ethernet.
Typical applications for the RICi-622GE include aggregating up to eight remote IP DSLAM backhauling sites (Figure 1), enterprise
connectivity (Figure 2), and high-bandwidth private line services.
RICi-622GE is equipped with two STM-4/OC-12 ports with SFP-based optical interfaces, offering either 1.2 Gbps with link bonding
using VCAT (G.707/Y.1322) and LCAS (G.7042), or 1+1 link protection mechanism (unidirectional MSP/APS) to increase service
uptime. The RAD RICi-622GE has two Gigabit Ethernet ports that support Gigabit Ethernet link redundancy based on standard link
aggregation protocol IEEE 802.3ad. The Gigabit Ethernet ports can be ordered with SFP-based optical interfaces or
10/100/1000BaseT interfaces.
RICi-622GE FLEXIBLE TRAFFIC MAPPING
The incoming customer traffic is mapped to the Ethernet flows (EVCs) using the following per-port criteria:
Port-based (All-in-one bundling)
User port + CE-VID
User port + CE-VLAN priority. Each Ethernet flow can either have a single service assigned to it or up to eight services that are
differentiated by the CE-VLAN P-bits (EVC.CoS).
RICi-622GE ENCAPSULATION
Traffic is encapsulated with:
Generic Framing Procedure (ITU-T G.7041, ANSI T1-105.02), framed mode
Link Access Procedure for SDH/SONET (LAPS) protocol following draft recommendation ITU-T X.86.
RAD RICi-622GE QUALITY OF SERVICE QoS
Different service types require different levels of QoS to be provided end-to-end. QoS can be defined per subscriber as well
as per service. QoS has two aspects: rate limitation and traffic prioritization.
Two policing mechanisms (upstream and
downstream) are applied per service. The policing mechanisms operate according to the dual leaky bucket mechanism (CIR+CBS,
EIR + EBS: two rates, three colors).
For prioritizing user traffic, RICi-622GE features up to four separate queues. The queues handle traffic with different service
demands, such as real-time traffic, premium data, or best-effort data. The preceding capabilities allow service providers to offer
different services and traffic types over the same link.
SDH/SONET TIMING OPTIONS WITH RAD RICi-622GE
The user can define the following SDH/SONET clock sources:
Internal
Recovered from STM-4/OC-12 interface.
SDH/SONET RICi-622GE LINK REDUNDANCY
The unit supports a 1+1 link protection mechanism (APS), according to the ITU-T G.841 requirements (unidirectional
MSP). Additional protection is provided by the VCAT and LCAS protocols.
RICi-622GE GIGABIT ETHERNET LINK REDUNDANCY
To allow reliable and uninterrupted service, the Gigabit Ethernet ports can be set to work in 1:1 or 1+1 automatic protection
switching mode, according to link aggregation protocol (IEEE 802.3ad).
MEF COMPLIANCE OF RAD RICi-622GE
RICi-622GE is certified by the Metro Ethernet Forum (MEF) for the following services:
MEF 9: EPL, EVPL
MEF 14: EPL, EVPL
RICi-622GE FAULT PROPAGATION
The RAD RICi-622GE features a user-configurable bidirectional fault propagation mechanism that notifies local and remote
equipment of faulty conditions. This enables routers and switches on both ends of the link to reroute traffic.
SDH/SONET alarms can optionally propagate and cause the Gigabit Ethernet link to shut down. The Gigabit Ethernet alarms can
also be propagated over the SDH/SONET link.
RICi-622GE MANAGEMENT
The RAD RICi-622GE can be managed with the following ports and applications:
Out-of-band management via Fast Ethernet or RS-232 port
Remote inband management via SDH/SONET or Gigabit Ethernet port. Remote management is performed using Telnet, Web
browser, or an SNMP-based management system.
RICi-622GE SECURITY
RICi-622GE supports the following security protocols, providing a high level of client-server communication security.
SNMPv3
RADIUS authentication
SSL for Web-based management
application
SSH for Secure Shell communication
session.
RICi-622GE Gigabit Ethernet over 2 x STM-4/OC-12 Network Termination Unit
product data sheet (pdf)
