Specifications

Chapter 1 Introduction Installation and Operation Manual
1-6 Overview MPW-1 MP-4100 Ver. 2.0
The proper balance between the PSN throughput and delay is achieved via
configurable packet size. A jitter buffer with selectable size compensates for
packet delay variation (jitter) of up to 200 msec in the network.
On the TDM side, MPW-1 timing is locked to the Megaplex-4100 nodal timing,
because its traffic is synchronously collected from Megaplex-4100 TDM buses,
and the received traffic is also deposited on these buses. Each pseudowire has its
own adaptive timing recovery mechanism, in accordance with the options listed in
RFC4197. The recovered pseudowire clocks can be used as timing reference
signals for the nodal Megaplex-4100 timing subsystem, and therefore MPW-1
allows flexible timing distribution.
The MPW-1 module supports 1:1 redundancy protection between internal DS1
ports, and between an internal DS1 port and a user-selected legacy TDM port
(E1, T1, SHDSL, PDH, etc.) with redundancy. To minimize traffic when a
pseudowire it is not active due to the redundancy mechanism, the pseudowire
transmits only OAM packets to ensure connectivity.
The MPW-1 module operating parameters are determined by commands received
from the Megaplex-4100 CL module. The CL module can also download new
software to the module, when the Megaplex-4100 software is updated.
The module supports comprehensive diagnostics, including power-up self-test,
and local and remote loopbacks for each port. Front-panel indicators indicate at a
glance the status of Ethernet module ports.