Zyxel-communications Multi-service Access Platform MSAP2000 Manuel d'utilisateur télécharger pdf (Page 32)

2. System Architecture

MSAP2000 Technical Manual V3.0 2-12

2.10. Flexible Topology

MSAP2000 supports various types of network topologies, such as

Point-to-Point, Star, Linear, Tree & Branch, and Ring. With its

expansible shelves, and plug & play modular design, MSAP2000 offers

tremendous operational flexibility for Service Providers.

Point to Point

A COT is connected directly to a RT. This is the most common type of

network structure for access networks. 1+1 Protection is provided for

the COT and RT. For P-2-P topology, one RT is needed.

Point to

multipoint

(Star)

MSAP2000 uses the Time Slot Interchange (TSI) technology, to set all

Channel Assignments (CA) at a 64 Kbps time slot base, to provide

maximum bandwidth efficiency. Any input or output ports in either the

COT or RT can cross connect at a basis of 64 Kbps. In star topology,

one node can connect to 5 RTs.

Linear

In a linear topology, a COT installed in the central exchange station can

provide linkage to up to 16 RTs. The transmission media used to

connect COTs and RTs are varied, ranging from optic fibers, to copper

wires, to wireless transmission. For linear topology, eight RTs can be

cascaded.

Tree and

Branch

MSAP2000 supports tree and branch topologies. Each combination set

can support up to 16 RTs, and Optical Interface Modules (OIM) or

multiple E1 interfaces will serve as the trunking interface among the RTs.

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Zyxel-communications Multi-service Access Platform MSAP2000 Manuel d'utilisateur Page 32