Traffic And Cross-Connect Functionality - Eci Telecom XDM-100 General Description Manual

System Design

4.3 Traffic and Cross-connect Functionality

The heart of the XDM-100 is a powerful, high-capacity, non-blocking 4/4/3/1
high/low-order cross-connect matrix located in the MXC card.
The matrix core supports up to 192 VC-4 equivalents (4/4/3/1). The MXC card
provides STM-1, STM-4, or STM-16 optical interfaces.
In the SONET version, the matrix core supports up to 192 STS-3c equivalents
(4/4/3). The MXC card provides OC-3, OC-12, or OC-48 optical interfaces.
The XDM-100 multiplexer may have two alternate configurations – the redundant
configuration, which uses both the MXC A and MXC B cards, and the
non-redundant configuration, using an MXC A card and the bridge card, MXC-BR
(instead of the MXC B card). All interface modules (SAM, SIM, PIM, EISM, OHU)
connect to the central matrices in a star configuration.
The main functions of the MXC matrix include:
High-order and low-order SDH 4/4/3/1 or SONET 4/4/3 matrix cross-
♦
connects at the VC-12/VT-2SPE, VC-2/VT-6SPE, VC-3/STS-1SPE,
VC-4/STS-3c, and VC-4nc/STS-nc order up to 192 STM-1/OC-3 equivalents
(576 STS-1 equivalents).
Cross-connect section protection termination. The MXC matrix core supports
♦
MS linear protection, bidirectional and unidirectional MSP/APS 1+1, and
MS shared protection ring (MS-SPRing/BLSR) mechanisms by processing
the K1/K2 Automatic Protection Switching (APS) bytes.
Overhead cross-connect. The matrix has a cross-connect capability of
♦
SDH/SONET overhead bytes (such as E1, E2, F1, F2, and unused). This
capability is available in all STM-n/OC-n ports.
Each I/O module is directly connected to the matrix cores (both main and protection)
and linked to every cross-connect direction and level. The link is fully redundant at
intershelf levels.
Figure 4-4 illustrates the simplified XDM-100 overall block diagram. It provides an
overview of both the physical and functional partitioning of the system.
4-6 ECI Telecom Ltd. Proprietary
XDM® -100
417006-2005-013-A02