Cisco MGX 8850 Manuale utente

CHAPTER

2-1

Cisco MGX 8850 Multiservice Switch Installation and Configuration

Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005

Module and Service Descriptions

This chapter includes detailed descriptions of the modules, cards and services available with the

MGX 8850:

•Processor Switching Module, page 2-1

•Service Resource Module, page 2-12

•ATM UNI Service Module (AUSM), page 2-15

•Frame Relay Service Modules, page 2-20

•Circuit Emulation Service Modules, page 2-45

•Voice Service—VISM, page 2-55

Processor Switching Module

The PXM1 card set consists of the PXM1 front card, the PXM1 User Interface back card (PXM1-UI or

PXM-UI-S3), and various uplink back cards that can serve as either a trunk or a UNI.

For physical details of PXM1 cards, see Appendix A, “System Specifications.”

Caution Handle the PXM1 front card very carefully to preserve the alignment of the attached disk drive. Do

not drop or bump the PXM1.

Caution Before using the MGX 8850, verify that the daughter card on the PXM1 corresponds to the uplink

card type. Serious damage may result if the power is on and these cards are mismatched.

Note If you accidentally insert a back card for a service module into slot 7, 8, 23, or 24, carefully remove

the back card and check for bent or damaged pins on the backplane and the back card.

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Cisco MGX 8850 Multiservice Switch Installation and Configuration

Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005

Chapter 2 Module and Service Descriptions

Processor Switching Module

PXM1 Features

The PXM1 (see Figure 2-1) is a combination ATM switching fabric, data processing, and ATM interface

card. This module combines a 1.2 Gbps shared-memory switching fabric with integrated trunking at

speeds up to OC-12. The switching fabric provides 1.2 Gbps of non-blocking switching capacity, while

the processor provides the control plane that delivers IP+ATM networking software, diagnostics, and

performance monitoring.

The PXM provides integrated switching, processing, and broadband interfaces to provide the following

high-performance switching and trunking features:

•1.2-Gbps non-blocking switching

•Integrated T3/E3, OC-3c/STM-1, OC-12c/STM-16

•ATM trunking

•Linear Automatic Protection Switching for the SONET interfaces.

Note APS is available only for the “B” models of the OC-3 and OC-12 uplink cards.

•Hot card insertion/removal

•1:1 hot standby redundancy

•User-selectable primary and secondary clock sources with graceful switchover

•Internal Stratum-4 or optional Stratum-3, external BITS, or inband clock sources

•Inband management or out-of-band via EIA/TIA-232 or 10BaseT control ports

•Narrowband service modules

•Broadband trunking support

•DSO to OC-12c/STM-4 interfaces supported

PXM1 Illustration and LED Description

PXM1 provides connectors for external audio and visual alarms. The interface can either be always open

or always closed. Major and minor alarms are controlled separately. An alarm cutoff button is accessible

from the front. A history LED is set when the alarm cutoff button is pressed. The history LED can be

cleared by pressing the history clear button on the faceplate.

The PXM1 provides the following indicators:

•System Status Active/Standby/Fail/standby update (green/yellow/red/flashing yellow)

•Critical alarm (blue)

•Major alarm (red)

•Minor alarm (yellow)

•DC OK A (green = OK, red = not OK)

•DC OK B (green = OK, red = not OK)

•ACO (green)

•History (green)

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Cisco MGX 8850 Multiservice Switch Installation and Configuration

Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005

Chapter 2 Module and Service Descriptions

Processor Switching Module

•Port Activity Active and Clear/Remote alarm/ Local alarm (green/yellow/ red)

•LAN activity (flashing green)

Figure 2-1 PXM1 Front Card

PXM1 User Interface Back Cards

The PXM1 User Interface (PXM1-UI) back card provides ports for communication and control. This

card is also used to connect the system to an external clocking source. Install this card in the upper half

of the back of the PXM1. See the “User Interface Access Ports” section on page 5-2 for more information

on the PXM1 back card ports.

There are two options for the PXM1 User Interface back card:

11439

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Cisco MGX 8850 Multiservice Switch Installation and Configuration

Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005

Chapter 2 Module and Service Descriptions

Processor Switching Module

1. PXM1-UI (standard)

The PXM1-UI back card shown in Figure 2-2 provides

•One RJ-45/48 for external T1 or E1 clock input

•One BNC connector for E1 clock input

•One DB-15 female connector for alarm interface

•Maintenance, control and LAN ports.

2. PXM-UI-S3 (optional)

The PXM-UI-S3 back card shown in Figure 2-3 provides Stratum-3 clocking:

•One RJ-45/48 connector for external T1 or E1 clock input (CLK1).

•One DB-15 female connector for alarm interface (Alarm).

•Maintenance, control and LAN ports.

Note The LAN2 and CLK2 ports on the PXM-UI-S3 are not supported in this release. All external

connections are made with the LAN1 and CLK1 ports.

Making External Clock Connections

If external equipment or a local digital central office is to provide synchronization, the external clock

source is connected to the PXM1-UI or PXM-UI-S3 back card.

Stratum-4 clocking

External clocking sources are connected to the PXM1-UI back card (see Figure 2-2).

•One RJ-45/48 connector for external T1 or E1 clock input.

•One BNC connector for E1 clock input.

Stratum-3 clocking

External clocking sources are connected to the PXM-UI-S3 back card (see Figure 2-3).

For T1 and E1 Stratum-3 external clock input, connect the source to the RJ-45/48 connector labeled

“CLK1.”

Note The LAN2 and CLK2 ports on the PXM-UI-S3 are NOT supported in this release. All external

connections are made with the LAN1 and CLK1 ports.

See Chapter 5, “Configuring the MGX 8850 Shelf” for information on configuring an external clocking

source.

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Cisco MGX 8850 Multiservice Switch Installation and Configuration

Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005

Chapter 2 Module and Service Descriptions

Processor Switching Module

PXM1 Back Card Illustrations

This section contains illustrations of the following PXM1 cards:

•Figure 2-1: PXM1 Front Card

•Figure 2-2: User Interface Back Card (PXM1-UI)

•Figure 2-3: User Interface Back Card (PXM-UI-S3): Stratum-3 Clocking

•Figure 2-4: OC-12 Long-Reach Back Card (SMFLR-1-622/B)

•Figure 2-5: OC-12 Intermediate-Reach Back Card (SMFIR-1-622/B)

•Figure 2-6: OC-3 Four-Port Back Card (SMF-155/B)

•Figure 2-7: Two-port T3 Back Card (BNC-2T3)

•Figure 2-8: Two-port E3 Back Card (BNC-2E3)

PXM1 User Interface Back Cards

See the “PXM1 User Interface Back Cards” section on page 2-3 for descriptions of the features available

with the PXM1 User Interface back cards.

Figure 2-2 User Interface Back Card (PXM1-UI)

57659

PXM1-UI

E1 CLOCK

T1 clock

Maintenance port

Control port

LAN port

E1 clock source

Alarm outputs

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Cisco MGX 8850 Multiservice Switch Installation and Configuration

Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005

Chapter 2 Module and Service Descriptions

Processor Switching Module

Figure 2-3 User Interface Back Card (PXM-UI-S3): Stratum-3 Clocking

Alarm Output Connection

Dry contact relay closures are available for forwarding MGX 8850 alarms to an alarm system. Separate

visual and audible alarm outputs are available for major and minor alarm outputs. The MGX 8850 alarm

outputs are available on a DB-15 connector on the PXM-UI-S3 back card faceplate. See Appendix B,

“Cabling Summary,” for the pinouts on this connector. Use the switchboard cable for running these

connections.

PXM

UI-S3

EXT CLK 1

46010

EXT CLK 2

External Clock 1

(connection for T1 and E1

external clock sources)

LAN 2 port

(not supported in this release)

LAN 1 port

Maintenance port

Control port

External Clock 2

(not supported in this release)

Alarm port

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Cisco MGX 8850 Multiservice Switch Installation and Configuration

Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005

Chapter 2 Module and Service Descriptions

Processor Switching Module

SMFLR-1-622 Back Card

An illustration of the long-reach OC-12 card appears in Figure 2-4. For specifications on this card, see

Appendix A, “System Specifications.” Note that Automatic Protection Switching (APS) requires the “B”

model—an SMFLR-1-622/B.

Figure 2-4 OC-12 Long-Reach Back Card (SMFLR-1-622/B)

12210

SMFLR-1-622

ENABLED

SIGNAL

2-8

Cisco MGX 8850 Multiservice Switch Installation and Configuration

Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005

Chapter 2 Module and Service Descriptions

Processor Switching Module

SMFIR-1-622 Back Card

The intermediate-reach OC-12 back card appears in Figure 2-5. For specifications on this card, refer to

Appendix A, “System Specifications.” Note that Automatic Protection Switching (APS) requires the “B”

model—an SMFIR-1-622/B.

Figure 2-5 OC-12 Intermediate-Reach Back Card (SMFIR-1-622/B)

66964

SMFIR-1-622

ENABLED

SIGNAL

2-9

Cisco MGX 8850 Multiservice Switch Installation and Configuration

Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005

Chapter 2 Module and Service Descriptions

Processor Switching Module

SMF-155 Back Card

The SMF-155 back card provides a physical single-mode fiber optic SONET OC-3 interface that

conforms to ANSI T1.105 and GR-253-CORE standards. This interface uses SC connectors, and

redundant configurations are supported through Y-cables. For specifications on this card, see

Appendix A, “System Specifications.” Note that Automatic Protection Switching (APS) requires the “B”

model—an SMF-155/B.

Figure 2-6 OC-3 Four-Port Back Card (SMF-155/B)

12206

ENABLED

SC-4-155

SIGNAL

2-10

Cisco MGX 8850 Multiservice Switch Installation and Configuration

Release 1.1.31, Part Number 78-11223-03 Rev. B0, May 2005

Chapter 2 Module and Service Descriptions

Processor Switching Module

BNC-2T3 Back Card

The BNC-2T3 back card provides two T3 ports.

For card specifications, refer to Appendix A, “System Specifications.”

Figure 2-7 Two-port T3 Back Card (BNC-2T3)

12209

BNC-2T3

SIGNAL

PORT 1

SIGNAL

PORT 2

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