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Table of Contents

Installing the Hardware

Installing the Hardware

This chapter describes how to mount the chassis in a rack and install circuit cards, and contains the following sections:

Tools Required

Hardware Required

Installing the Chassis

Installing Front Cards

Installing Back Cards

Tools Required

Make sure that you have the following standard tools before beginning the installation:

Hardware Required

The Cisco MGX 8260 chassis mounts in a standard 19 inch or 23 inch equipment rack. Before starting the installation procedure, check that you have the necessary hardware components for your system (see tables below).


Table 2-1: Chassis and System Control Components
Cisco Part Number Description

MGX8260

MGX 8260 chassis and accessory kit

SCC5FC-4FE

SCC-5Gbps Front Card, 4 100BaseT Broadband Ports

SCCBC-4FE

SCC-Back Card with NMS Ports and 4 100BaseT Network Interface

AC-DC-EXTPSS

MGX8260 Power Supply (Optional)


Table 2-2: Front Circuit Cards
Cisco Part Number Description

BSCFC-6T3

BSC-Front Card for 3/1/0 TDM switching of 6 DS3 channels

DMCFC-6T3

DMC-Front Card for 3/1/0 TDM distribution of 6 DS3 channels

NSCFC-8DSP

NSC-Front Card for 8 T1/E1 channels

NSCFC-16DSP

NSC-Front Card for 16 T1/E1 channels


Table 2-3: Back Circuit Cards
Cisco Part Number Description

T1E1BC-50NR

Non-redundant Back Card for 16 T1/E1 interfaces (50-pin connectors)

T1E1BC-RED

Back Card for 1:N redundant support of DS1 channels

T3E3BC-6DSX

T3-Back Card for 6 (TX and RX) SMB Male DS3 Interfaces

To complete the setup procedure, you also need a VT-100 terminal or a PC running terminal emulation software.

Hardware Component Spacing

The spacing between the Cisco MGX 8260 hardware components is important for several reasons.

Install the plenum over the uppermost MGX 8260 in the rack.

Installing the Chassis

To install the Cisco MGX 8260 chassis, follow these steps:

Step 1 Attach the mounting brackets to the chassis using the sixteen screws provided. Position the long side of the bracket against the chassis for a 19" rack, or the short side against the chassis for a 23" rack. With either position, you can mount the bracket flush with the front of the unit, or recessed by 5" or 8" (see figure Figure 2-1).

Note The chassis is typically empty. Do not insert or remove cards at this time.

Figure 2-1: Attaching the Mounting Brackets


Step 2 Using the mounting bracket and twelve screws, mount the empty Cisco MGX 8260 chassis in the equipment rack (see Figure 2-2).


Figure 2-2: Mounting the Chassis


Step 3 At the rear of the Cisco MGX 8260 chassis, connect a protective grounding wire to the chassis grounding lug (see Figure 2-3). Use a #10 RING LUG for 16-14 AWG wire.


Figure 2-3: Grounding the Chassis


Step 4 Using a socket wrench, tighten the ground terminal nuts.

Step 5 Connect the other end of the ground wire to an "earth" ground near the chassis.

Installing Front Cards

The Cisco MGX 8260 chassis holds front and back cards. Start installing cards from the front.

Warning Observe standard electrostatic discharge (ESD) precautions before handling, inserting, or removing cards.

To install front cards, follow these steps:

Step 1 Put on an antistatic wriststrap and connect it to the front of the chassis.

Step 2 From the front of the chassis, install an SCC card in slot 9 or 10 (see Figure 2-4). Holding the card with the extraction levers straight out, slide the card into the slot, and seat it firmly in the backplane.

Warning Handle the card gently. Bending or forcing the card can cause permanent damage.

Figure 2-4: Inserting the SCC Front-Mounted Cards


Step 3 Secure the card at the top and bottom with the captive mounting screws.

Step 4 If your system uses SCC redundancy, install the second SCC in slot 9 or 10 and secure it.

Step 5 If your system has switched DS3 interfaces, install and secure up to six BSCs in slots 11 through 16.

Note When setting up 1:1 BSC redundancy, install the primary and secondary BSCs in adjacent slots.

Step 6 If your system has DS3 lines with M13 mapping, install and secure one or two DMC card. If there is a SCC in slot 9, install a DMC in slot 7; If there is a SCC in slot 10, install a DMC in slot 8.

Note DMCs only work in slots 7 or 8 and must be paired with SCCs in slots 9 or 10, respectively.

Step 7 If your system has T1 interfaces, install and secure up to six NSCs in slots 1 - 6 or 11-16. For systems without DMC cards, you can install up to two additional NSCs in slots 7 and 8.

Step 8 Remove your wriststrap from the front of the chassis.

Installing Back Cards

To install back cards, follow these steps:

Step 1 Connect your wriststrap to the rear of the chassis.

Step 2 From the rear of the chassis, install an SCC back card behind an SCC front card, in slot 9 or 10 (see Figure 2-5).


Figure 2-5: Inserting SCC back-Mounted Cards


Step 3 Secure the SCC at the top and bottom with the captive mounting screws.

Step 4 If your system uses SCC redundancy, install the second SCC back card in the remaining slot, either 9 or 10.

Step 5 If your system has switched DS3 interfaces, install and secure DS3 back cards behind each BSC front card.

Step 6 If your system has DS3 lines with M13 mapping, install and secure DS3 back cards behind each DMC front card.

Step 7 If your system has T1 interfaces, install and secure the appropriate T1 back cards behind each NSC front card. NSC slots use the T1 back card unless they are dedicated to T3 lines or use the redundant back card.

Step 8 Remove your wriststrap from the rear of the chassis.


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Posted: Tue Apr 4 11:12:41 PDT 2000
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