Exartech Sigma is a compact STM-1/STM-4 add/drop
multiplexer, specially suitable for the
utilization in extending networks to the edge by
providing
cost-effective multi-service access and delivering
more revenue-generating services to subscribers.
It transports TDM (Time Division Multiplexing),
Ethernet and IP (Internet Protocol) over existing
SDH (Synchronous Digital Hierarchy) network, and
can be customized for the traffic demand, in the
access network, which is typical for
residential and business applications.
Key
features:
l
Fully cross connection
l
Terminal Multiplexer (TM) and Add/Drop Multiplexer
(ADM) applications
l
Topology: Point to Point, Linear, and Ring
l
Remote software downloadable
l
Support 1+1 Linear MSP (Multiplex Section
Protection) and (SNCP Sub-Network Connection
Protection)
l
Friendly GUI (Graphic User Interface) for OAM&P
(Operation, Administration, Maintenance, and
Provision)
l
Optional point to point EOW (Engineering Order
Wire) function
Application
Diagram:
The main unit consists:
Ø
Two
ports STM-1 (or STM-4) optical interface (for 1+1
MSP or SNCP)
Ø
16
ports E1 interface (120 ohm; 75 ohm for option)
Ø
External 2M clock source
Ø
RS-232 and LAN port for network management
Ø
LED
display and alarm output
Sigma provides the following expansion cards:
Ø
STM-1o (optical interface)
Ø
STM-1e (electrical interface)
Ø
E1
(can be configured as T1)
Ø
10/100 BASE-T
Ø
DS3
(can be configured as E3)
Ø
V.35
(N x 64K)
Ø
SHDSL
System Overview of Sigma:
