Cisco Systems 8600 Series manual ASI-155 Simplified Block Diagram

ASI-155, ATM Service Interface Card

•Provides optional cell descrambling, header error check (HEC), and idle cell filtering.

•Provides a small FIFO buffer for incoming cells.

•Provides optical to electrical conversion.

The Line Interface Unit (LIU) performs the following egress functions:

•Inserts the appropriate framing into the outgoing bit stream.

•Inserts any alarm codes for transmission to the far end.

•Provides optional cell scrambling, HEC generation, and idle cell insertion.

•Provides a small FIFO buffer outing cells.

•Provides electrical to optical conversion.

Figure 5-7 ASI-155 Simplified Block Diagram

CommBus

interface

Control/Admin

processor

Network

address table

LIU = Line Interface Unit

CIE = Cell Input Engine

QSE = Queue Service Engine

ALI = ATM Layer Interface

SCF = Supervisory Cell Filter

StrataBus

Ingress (to BCC switching matrix)

Egress (from BCC switching matrix)

	CIE port 1
	ALI
Serial	CIE port 2
Interface
Unit	QSE port 1
(SIU)
	SCF, ports
	1 and 2
	QSE port 2

LIU port 1

LIU port 2

H8232

Monitoring Statistics

Port, line, and channel statistics are collected by the ASI-155. The StrataView Plus workstation is used to collect and monitor these statistics. For additional information regarding ASI-155 statistics refer to the Cisco StrataView Plus Operations Guide.

Front Panel Indicators

The ASI-155 front panel (see Figure 5-8)has a three-section, multicolored “card” LED to indicate the card status. The card status LED is color-coded as indicated in Table 5-2.A two-section multicolored “port” LED indicates the status of the two ports on the ASI-155. The port status LED display is color-coded as indicated in Table 5-2.

5-14Cisco BPX 8600 Series Reference