General; Introduction To The Equipment - Alcatel 1850 TSS-320 Technical Handbook

1 GENERAL

1.1 Introduction to the equipment

Classical transport networks originally designed for TDM (voice) traffic are nowadays more and more
asked to meet the growing demand for a large variety of new (especially data) services with carrier class
levels of reliability and fault tolerance.
A smooth evolution from a classical transport network (mainly based on Sonet/SDH and PDH
technologies) towards an integrated network solution coping with optical, TDM and data services calls for
platforms capable to manage several technologies at the same time.
The new 1850 TSS-320 (Transport Service Switch) works around the UNIVERSAL MATRIX concept
integrating in a single chip several network (matrix) layers (i.e. from ODU to Sonet/SDH to packets).
The whole UNIVERSAL MATRIX capacity can be freely partitioned between TDM and packet traffic (from
100% TDM and 0% packets to 0% TDM and 100% packets) with "slot" granularity. This is possible thanks
to the following key architectural concepts:
– Payload matrix or matrices are not performing traffic processing but just cross connection
– Traffic processing inside a layer is performed on Port Cards specific to that layer and directly
connected to the portion of the UNIVERSAL MATRIX belonging to the layer
– Optional Adapter Cards or Plug-In Modules (PIM) are used to interconnect different layers (matrices)
either integrated or external to the UNIVERSAL MATRIX: in these cards are put the termination and
adaptation functions required by a layered approach.
In this way the signal processing associated to different network layers is distributed among different
boards; therefore the system cost and configuration can smoothly scale according to the traffic mix and
network layers actually needed being
– the major system complexity left in port cards (working inside a layer) and adapter cards or modules
(working between different layers)
– the system capacity directly proportional to the port cards and adapter cards actually equipped
– the overall matrix capacity shared among different layers and the amount of bandwidth per layer
dynamically changed on "slot" basis
The network layers and behaviors integrated in 1850 TSS-320 are:
• For TDM applications
– ITU-T G.707 and G783 (SDH) along with GR-253 and T1.105 for Sonet
– ITU-T G.709 and G.798 (OTH)
Technical Handbook Common
General
Alcatel 1850 TSS-320 Rel. 1.1
8DG 07734 AAAA Edition 01 15/270