Verilink AS2000: The Basics (880-502981-001) Product Manual Manual do Utilizador descarregar pdf (Página 19)

System Information

Verilink Access System 2000: The Basics 2-3

A5) is expanded to another shelf. Data bus extensions are only

supported by (non-IMUX) TABs-based modules, i.e. TAC 2010 and

DIU modules.

NOTE:

The NCM does not support data bus extension.

Figure 2-2 illustrates the data bus configuration using the MLS 2000

and MLS 2200 series shelves.

Figure 2-2 AS2000 Data Bus Example

ACP Data Bus

Structure

The ACE architecture includes expanded data bus bandwidth,

enabling greater switching capacity between ACP modules. While

TABS-based modules have three 1.544 Mbit/s data buses—A, B, and

C—with ACE architecture, the B and C buses are 2.048 Mbit/s, and

the Bus A bandwidth is increased to 16.384 Mbit/s (8 E1 lines). The

total bandwidth available is 20.480 Mbit/s. Timeslot 0 of each ACP

bus A is used for framing. Bus A is divided into two sections,

designated as the low A bus and the high A bus. The low bus data

is sampled on the down stroke of the receive clock, and the high

bus data is sampled on the up stroke of the same clock.

8 9 10 11 12 131

Power

Supply

Power

Supply

Data Bus A

Data Bus B

Data Bus C

8 9 10 11 12 131

Power

Supply

Power

Supply

Data Bus B

Data Bus C

Data Bus

Expansion

Cable

MLS2000

MLS2200

8 9 10 11 12 131

Power

Supply

Power

Supply

Data Bus B

Data Bus C

MLS2200-4i

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