Westermo PMI-110-F2G - Manual (Page 7)

100/1000Mbps DDM SFP transceiver for High Quality Monitoring
The SFP sockets of the PMI‐110‐F2G supports 100Mbps and 1000Mbps SFP type fiber
transceiver with speed detection and independent indication. Moreover, it supports DDM
(Digital Diagnostic Monitoring) type SFP transceivers allowing users to diagnose optical cable
transmission problem through maintenance and debugging of the optical signal quality by DDM
without the need of an extra optical cable analyzer, as a result greatly saving time and system
costs.
Rapid Super Ring (RSR) Technology
The PMI‐110‐F2G supports Rapid Super Ring technology. The recovery time is greatly improved
from 30ms to few ms for both copper and fiber ring. The Ring master can be auto‐selected by
RSR engine. The 1st ring port of the R.M. is the primary path while the 2nd ring port of the R.M.
is the block path. Once the primary path fails, the 2nd path will be recovered within few ms.
Besides, the restoration time is also shortened to zero in the R.M. auto‐selection mode .
Comprehensive Redundant Solutions – Multiple Super Ring (MSR)
PMI‐110‐F2G also supports advanced Ring technology – M.S.R. (Multiple Super Ring) which
includes various new technologies for different network redundancy applications and structures.
The supported MSR allows PMI‐110‐F2G aggregating up to 5 Rapid Super rings includes 4 Fast
Ethernet plus 1 Gigabit Ethernet rings into one switch. With the MSR technology, a node can be
configured to multiple rings with the failover time. In addition, users can extend the ring
topology by adding hundreds of PMI managed switches to meet the large‐scale network needs
without compromising the network speed. The MSR also allows PMI‐110‐F2G managed switch
to easily connect with core management switches via standard Rapid Spanning Tree Protocol
(RSTP) or through multiple paths or nodes to increase the reliability by RDH (Rapid Dual Homing)
technology. By integrating MSR and LACP (Link Aggregation Control Protocol), the PMI series
can enhance the link ability and increase the overall link capacity. Two or more Fast Ethernet
connections are combined in order to increase the bandwidth and to create a resilient and
redundant link .
Seamless Ring Port Restoration
Seamless restoration is a new patented technology which can restore a failed ring without
causing any loop problem, topology change and packet loss. With a 0 second restoration time,
this mechanism eliminates any unstable status and guarantees the applications running
non‐stop.
Rapid Dual Homing (RDH) Technology
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