Turin Networks TE-50, User Manual, Page: 114 / 668

Turin Networks, Inc. Ch 1-7: SDH-AU3 Linear 1+1 Configuration Example
Page 2
Node C
Terminates 28x E1, 21x E1 to the West and 7x E1 to the East
Terminates 2x DS3, 1x DS3 to the West and 1x DS3 to the East
Node D
Terminates 28x E1 and 1x DS3
1.1 TRUNK CIRCUIT CONNECTIONS
A Multi-Drop linear network is a linear series of connected network nodes that has a terminal node at
each end and multiple mid-span nodes in between. There is a choice of STM-1/OC-3 trunk interface
modules that can be used in this topology. The standard STM-1/OC-3 interface modules can be used
except in the case of 1+1 protection configuration on a mid-span node. The Linear 1+1 trunk module
incorporates the trunk switching support and both working and protection trunks. This module can be
used in all terminal and mid-span nodes with or without trunk protection. For additional details, refer
to Chapter 2-17.
Trunk definitions are as follows:
•
Terminal nodes using the standard trunk interface modules: Slot 15 is defined as the working
trunk and slot 16 as the protection trunk. See the notes in Section 2.5, Use of standard trunk
interfaces.
•
Terminal nodes using the Linear 1+1 trunk interface modules: Slot 15 is contains both “working”
and “protection” trunks. Slot 16 is unused.
•
Mid-Span nodes: Slot 15 is defined as “West” and slot 16 as “East”.
•
Mid-Span nodes: Using the standard trunk interface modules, do not support 1+1 protection.
•
Mid-Span nodes: Using the Linear 1+1 trunk interface modules, provide 1+1 protection.