Field-Replaceable Units and Expansion Modules

This appendix lists

All field replaceable units (FRUs) in a LightStream 2020 multiservice ATM switch (LS2020 switch)
Expansion modules for NPs and line cards

(An expansion module includes everything needed to add a particular kind of card or module to an existing system.)

Part numbers for FRUs and expansion modules are provided in Table C-1. Part numbers for external data cables and power cords appear in the LightStream 2020 Site Planning and Cabling Guide. For descriptions of FRUs listed here, refer to the chapter entitled "Hardware Overview."

Caution Before removing any components from the chassis, read the safety instructions in the chapter entitled "Hardware Troubleshooting." You can damage the system by removing components when you are not grounded.

Table C-1 : FRUs and Current Part Numbers

Component Order Number

AC-powered base system¹ L2020-BASE-AC

Redundant AC-powered base system¹ L2020-BASE-AC-R

DC-powered base system¹ L2020-BASE-DC

Redundant DC-powered base system¹ L2020-BASE-DC-R

NP option module

NP card with 32 MB memory

NP access card and disk assembly

L2020-NP-DC=

NP access card L2020-NP-A=

Disk assembly L2020-DSK-DC=

Switch card only

Switch card with console/modem assembly

L2020-SC-NOCAB=
L2020-SWC=

Low-speed line card, V.35 module

Low-speed line card

Low-speed access card

2 V.35 fantails

2 4-ft (1.2 m) fantail cables¹

L2020-LSC-V35-M=

Low-speed line card, RS-449 module

Low-speed line card

Low-speed access card

2 RS-449 fantails

2 4-ft (1.2 m) fantail cables²

L2020-LSC-449-M=

Low-speed line card, X.21 module

Low-speed line card

Low-speed access card

1 X.21 fantail

2 4-ft (1.2 m) fantail cables²

L2020-LSC-X21-M=

Packet line card, Ethernet module

Packet line card

Ethernet access card

L2020-8E-M=

Packet line card, fiber Ethernet module

Packet line card

Fiber Ethernet access card

L2020-8EF-M=

Packet line card, FDDI module

Packet line card

FDDI access card

L2020-2FD-M=

Packet line card, serial V.35 module

Packet line card

Serial access card

2 V.35 fantails

2 8-ft (2.4m) fantail cables²

L2020-8S-v35-M=

Packet line card, serial RS-449 module

Packet line card

Serial access card

2 RS-449 fantails

2 4-ft (1.2 m) fantail cables²

L2020-8S-449-M=

Packet line card, serial X.21 module

Packet line card

Serial access card

1 X.21 fantail

2 4-ft (1.2 m) fantail cables²

L2020-8S-X21-M=

Packet line card, T1 circuit emulation (CEMAC) module

Packet line card

T1 circuit emulation access card

L2020-8T1-CE-M=

Packet line card, E1 circuit emulation (CEMAC) module

Packet line card

E1 circuit emulation access card

L2020-8E1-CE-M=

Packet line card, E1/BNC circuit emulation (CEMAC) module

Packet line card

E1 circuit emulation access card

E1 fantail with BNC connectors

4-ft (1.2m) fantail cable

L2020-8E1-CE-BN-M=

Packet line card, E1/SMZ circuit emulation (CEMAC) module

Packet line card

E1 circuit emulation access card

E1 fantail with SMZ connectors

4-ft (1.2m) fantail cable

L2020-8E1-CE-SM-M=

Cell line card, 1-port multimode OC-3c module

Cell line card (1 TSU)

1-port multimode OC-3c access card

L2020-1M-OC3-M=

Cell line card, 1-port single mode OC-3c module

Cell line card (1 TSU)

1-port single mode OC-3c access card

L2020-1S-OC3-M=

Cell line card, 2-port multimode OC-3c module

Cell line card (2 TSUs)

2-port multimode OC-3c access card

L2020-2M-OC3-M=

Cell line card, 2-port single mode OC-3c module

Cell line card (2 TSUs)

2-port single mode OC-3c access card

L2020-2S-OC3-M=

Cell line card, 4-port T3 module

Cell line card (1 TSU)

4-port T3 access card

T3/E3 fantail

4-port fantail cable bundle (4 ft (1.2m))

L2020-4T3-M=

Cell line card, 8-port T3 module

Cell line card (2 TSUs)

8-port T3 access card

T3/E3 fantail

8-port fantail cable bundle (4 ft (1.2m))

L2020-8T3-M=

Cell line card, 4-port E3 module

Cell line card (1 TSU)

4-port E3 access card

T3/E3 fantail

4-port fantail cable bundle (4 ft (1.2m))

L2020-4E3-M=

Midplane L2020-MID-PL=

AC bulk power tray, Rel. 2.1 (dual) L2020-PS-AC-D=

AC bulk power tray, Rel. 1 L2020-PS-AC=

DC bulk power tray L2020-PS-DC=

Blower assembly L2020-FAN=

Filler panels to cover 1 empty slot (front and rear) L2020-FIL-1=

Filler panels to cover 5 empty slots (front and rear) L2020-FIL-5=

Disk assembly connector: 64-pin DIN connector with spacer L2020-64DIN=

¹ 4-ft and 12-ft fantail cables are also available; contact your sales representative for details.

Component	Order Number
AC-powered base system¹	L2020-BASE-AC
Redundant AC-powered base system¹	L2020-BASE-AC-R
DC-powered base system¹	L2020-BASE-DC
Redundant DC-powered base system¹	L2020-BASE-DC-R
NP option module NP card with 32 MB memory NP access card and disk assembly	L2020-NP-DC=


NP access card	L2020-NP-A=
Disk assembly	L2020-DSK-DC=
Switch card only Switch card with console/modem assembly	L2020-SC-NOCAB= L2020-SWC=
Low-speed line card, V.35 module Low-speed line card Low-speed access card 2 V.35 fantails 2 4-ft (1.2 m) fantail cables¹	L2020-LSC-V35-M=






Low-speed line card, RS-449 module Low-speed line card Low-speed access card 2 RS-449 fantails 2 4-ft (1.2 m) fantail cables²	L2020-LSC-449-M=






Low-speed line card, X.21 module Low-speed line card Low-speed access card 1 X.21 fantail 2 4-ft (1.2 m) fantail cables²	L2020-LSC-X21-M=






Packet line card, Ethernet module Packet line card Ethernet access card	L2020-8E-M=


Packet line card, fiber Ethernet module Packet line card Fiber Ethernet access card	L2020-8EF-M=


Packet line card, FDDI module Packet line card FDDI access card	L2020-2FD-M=
Packet line card, serial V.35 module Packet line card Serial access card 2 V.35 fantails 2 8-ft (2.4m) fantail cables²	L2020-8S-v35-M=
Packet line card, serial RS-449 module Packet line card Serial access card 2 RS-449 fantails 2 4-ft (1.2 m) fantail cables²	L2020-8S-449-M=
Packet line card, serial X.21 module Packet line card Serial access card 1 X.21 fantail 2 4-ft (1.2 m) fantail cables²	L2020-8S-X21-M=
Packet line card, T1 circuit emulation (CEMAC) module Packet line card T1 circuit emulation access card	L2020-8T1-CE-M=
Packet line card, E1 circuit emulation (CEMAC) module Packet line card E1 circuit emulation access card	L2020-8E1-CE-M=
Packet line card, E1/BNC circuit emulation (CEMAC) module Packet line card E1 circuit emulation access card E1 fantail with BNC connectors 4-ft (1.2m) fantail cable	L2020-8E1-CE-BN-M=



Packet line card, E1/SMZ circuit emulation (CEMAC) module Packet line card E1 circuit emulation access card E1 fantail with SMZ connectors 4-ft (1.2m) fantail cable	L2020-8E1-CE-SM-M=



Cell line card, 1-port multimode OC-3c module Cell line card (1 TSU) 1-port multimode OC-3c access card	L2020-1M-OC3-M=


Cell line card, 1-port single mode OC-3c module Cell line card (1 TSU) 1-port single mode OC-3c access card	L2020-1S-OC3-M=


Cell line card, 2-port multimode OC-3c module Cell line card (2 TSUs) 2-port multimode OC-3c access card	L2020-2M-OC3-M=


Cell line card, 2-port single mode OC-3c module Cell line card (2 TSUs) 2-port single mode OC-3c access card	L2020-2S-OC3-M=


Cell line card, 4-port T3 module Cell line card (1 TSU) 4-port T3 access card T3/E3 fantail 4-port fantail cable bundle (4 ft (1.2m))	L2020-4T3-M=


Cell line card, 8-port T3 module Cell line card (2 TSUs) 8-port T3 access card T3/E3 fantail 8-port fantail cable bundle (4 ft (1.2m))	L2020-8T3-M=


Cell line card, 4-port E3 module Cell line card (1 TSU) 4-port E3 access card T3/E3 fantail 4-port fantail cable bundle (4 ft (1.2m))	L2020-4E3-M=


Midplane	L2020-MID-PL=
AC bulk power tray, Rel. 2.1 (dual)	L2020-PS-AC-D=
AC bulk power tray, Rel. 1	L2020-PS-AC=
DC bulk power tray	L2020-PS-DC=
Blower assembly	L2020-FAN=
Filler panels to cover 1 empty slot (front and rear)	L2020-FIL-1=
Filler panels to cover 5 empty slots (front and rear)	L2020-FIL-5=
Disk assembly connector: 64-pin DIN connector with spacer	L2020-64DIN=

Table of Contents

Field-Replaceable Units and Expansion Modules

Field-Replaceable Units and Expansion Modules