-155E
STM-1/OC-3 Add-Drop Multiplexer
Optional Ethernet interface configurations
include:
• 2-port bridging 10/100BaseT
• 6-port 10/100BaseT (two bridging and
four transparent ports)
• Single-port Ethernet
10/100/1000BaseT (RJ-45) or
1000BaseSX (SFP interface).
NETWORK INTERFACE
The STM-1/OC-3 interfaces are
user-configurable and provide a high-
quality and high-availability link, as well as
performance monitoring of the traffic
path.
The STM-1/OC-3 link is supplied with an
SFP socket (see
Ordering
). It is strongly
recommended to order this device with
original RAD SFPs installed. This will
ensure that prior to shipping, RAD has
performed comprehensive functional
quality tests on the entire assembled unit,
including the SFP devices. RAD cannot
guarantee full compliance to product
specifications for units using non-RAD
SFPs.
The user can define the following
SDH/SONET clock sources:
• Internal
• Recovered from the STM-1/OC-3
interface, including automatic selection
based on SSM (Synchronization Status
Messaging)
• External E1
• Station clock.
FCD-155E features an optional ADM
configuration mechanism with SNCP path
protection.
Optional 1+1 link protection mechanism
(unidirectional MSP/APS) and SNCP path
protection are also available.
Maintenance capabilities include
user-activated local loopbacks and remote
loopbacks on the STM-1/OC-3 main link
and PDH tributaries.
LAN INTERFACE
The 2-port 10/100BaseT or single-port
Gigabit Ethernet interfaces include a
built-in Ethernet bridge that supports
VLAN according to IEEE 802.1Q and
802.1p.
The 4-port transparent LAN extension,
without bridge functionality, creates total
separation between customers, for
security. The maximum frame length is
2 kB.
The 10/100BaseT LAN interface features
autonegotiation for plug-and-play
Ethernet connectivity and complies to
IEEE 802.3/Ethernet V.2 standards. The
interface also features VLAN stacking.
An optional Gigabit Ethernet port connects
one LAN port to eight virtual groups. This
option provides LAN extension over
SDH/SONET networks with bridge
functionality. The maximum frame length
is 2 kB.
Ethernet traffic is mapped into
SDH/SONET containers using VCAT and
encapsulated with:
• Generic Framing Procedure (ITU-T
G.7041, ANSI T1-105.02), framed
mode
• Link Access Procedure for SDH/SONET
(LAPS) protocols following draft
recommendation ITU-T X.85/X.86.
Each user’s Ethernet traffic can be
mapped into SDH/SONET virtual containers
in any of the following ways:
• Up to 63 × VC-12, or 84 × VT-1.5
• 3 × VC-3/STS-1
• 1 × VC-4.
Ethernet traffic can be switched to
different bundles of virtually concatenated
VCs (up to 8 bundles) according to a
predefined group.
Link Capacity Adjustment Scheme (LCAS) is
supported in compliance with the G.7042
standard, which allocates bandwidth
according to Ethernet traffic.
Gigabit
Ethernet
E3/T3
FCD-155E
Branch 1
Branch 7
FCD-155E
FCD-155E
Fast Ethernet
E1/T1
Fast Ethernet
E1/T1
SDH/SONET
Router
PBX
Headquarters
Router
PBX
PBX
Router
Figure 1. Corporate Ring Application
(184 strony)
(106 strony)
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