This Quick Start contains information you need to install and configure the router quickly.
For complete installation instructions, see the T640 Core Router Hardware Guide at
http://www.juniper.net/techpubs/hardware/.
WARNING: This Quick Start contains a summary of safetywarningsin “Safety
Warnings” on page47. For a complete list of warnings for this router, including
translations, see the T640 Core Router Hardware Guide at
http://www.juniper.net/techpubs/hardware/.
The router is shipped in a wooden crate. A wooden pallet forms the base of the crate.
The router chassis is bolted to this pallet. The shipping crate also contains an accessory
box and a Quick Start (this document).
Before installing the router, make sure that the site meets all the power, environmental,
and clearance requirements. See the site preparation guidelines in the T640 Core RouterHardware Guide.
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Rack-Mounting Requirements on page 4
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Tools Required to Unpack and Prepare the T640 Router for Installation on page 5
Rack-Mounting Requirements
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You can install the router in many types of racks, including a four-post rack or cabinet
or an open-frame rack.
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The rack rails must be spaced widely enough to accommodate the router chassis's
external dimensions: 37.45 in. (95.6 cm) high, 31 in. (78.7 cm) deep, and 17.43 in. (44.3
cm) wide. The mounting brackets extend the width to fit into standard 19-in. (48.3
cm) racks.
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The rack must be strong enough to support the weight of the fully configured router,
up to about 565 lb (256.3 kg). If you mount two routers in one rack, it must be capable
of supporting a combined weight of over 1100 lb (499 kg).
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For service personnel to remove and install hardware components, there must be
adequate space at the front and back of the router. Allow at least 24 in. (61.0 cm) both
in front of and behind the router.
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The rack or cabinet must have an adequate supply of cooling air.
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In a closed cabinet, there must be a minimum of 6 in. (15.2 cm) of unobstructed airflow
behind the router, or airflow baffles must be installed to prevent recirculation of hot
air and overheating.
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If the router is the only unit in the rack, mount it at the bottom.
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When mounting the router in a partially filled rack, load the rack from the bottom to
the top, with the heaviest component at the bottom of the rack.
Tools Required to Unpack and Prepare the T640 Router for Installation
Figure 1: Rack Clearances and Router Dimensions
Tools Required to Unpack and Prepare the T640 Router for Installation
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A mechanical lift—recommended
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1/2-in. or 13-mm open-end or socket wrench to remove bracket bolts from the shipping
pallet
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Phillips screwdrivers, numbers 1 and 2
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DC-powered routers: 7/16-in. (11 mm) hexagonal-head external drive nut driver, with
a torque range between 23 lb-in. (2.6 Nm) and 25 lb-in. (2.8 Nm), for tightening nuts
to terminal studs on each power supply on a DC-powered router
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AC-powered router:
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Phillips (+) screwdriver, number 2 to access the metal AC wiring compartment
6. Repeat Step 4 and Step 5 for the other spacer bar.
7. Tighten all the screws completely.
Installing the Small Mounting Shelf
The small shelf installs on the back of the rear rails, extending toward the center of the
rack. See Table 1 on page 7.
1. Partially insert a mounting screw into the lowest hole specified in Table 1 on page 7.
2. Install the small shelf on the back of the rear rack rails. Rest the bottom slot on each
flange on one of the mounting screws.
3. Partially insert screws into the open holes in the ears of the small shelf.
4. Tighten all the screws completely.
Removing the Center-Mounting Brackets
The router is shipped with a spacer bar attached to the back of each front-mounting
flange, and two center-mounting brackets attached to the chassis. Remove the center
mounting brackets from the chassis by loosening the screws at the top and bottom of
each bracket.
Installing the Mounting Hardware in an Open-Frame Rack
To install the mounting hardware for an open frame rack:
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Front-mount: Attach the large mounting shelf on the back of the rails. Remove the
center-mounting brackets from the chassis.
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Center mount: Attach the large mounting shelf on the back of the rails. You do not
have to remove the center-mounting brackets from the chassis.
The small mounting shelf is not needed for open-frame racks.Table 2 on page 10 specifies
the holes in which you insert mounting screws, and cage nuts if needed.
Removing the Spacer Bars and Center-Mounting Brackets on page 11
Installing Cage Nuts if Needed
Install cage nuts, if needed. On the back of the rack rails, install cage nuts for the large
shelf in the mounting holes specified in Table 2 on page 10.
Installing the Large Mounting Shelf
1. On the rear of each rack rail, partially insert a mounting screw in the lowest hole
specified in Table 2 on page 10.
2. Install the shelf on the rack. Rest the bottom slot in each flange on one of the installed
mounting screws.
3. Partially insert screws into the open holes in the flanges of the large shelf.
4. Tighten all the screws completely.
Removing the Spacer Bars and Center-Mounting Brackets
The router is shipped with a spacer bar attached to the back of each front-mounting
flange, and two center-mounting brackets attached to the chassis.
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If you plan to front-mount the router in an open-frame rack:
1. Remove the spacer bars by loosening the screws that fasten the spacer bars to the
front-mounting flanges.
2. Remove the center-mounting brackets from the chassis by loosening the screws
at the top and bottom of each bracket.
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If you plan to center-mount the router in an open-frame rack, leave the center-mounting
brackets attached to the chassis. Optionally, you can remove the spacer bars.
Because of the router's size and weight, we recommend that you install the router using
a mechanical lift. If a lift is unavailable, see the instructions for installing the rack without
a mechanical lift.
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Installing the Router Using a Lift on page 12
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Installing the Router Without a Mechanical Lift on page 13
Installing the Router Using a Lift
CAUTION: Do not lift the router using the installation handle or the handles
on the sides of the chassis. Use these handles only to help position the router.
1. Make sure the rack is properly secured to the building in its permanent location.
2. Remove the power supplies from the router as described in the T640 Core Router
Hardware Guide.
3. Insert the captive screws of the installation handle into the holes previously occupied
by the captive screws of the power supplies. Attach the installation handle, tightening
the captive screws firmly to secure it to the chassis.
4. Load the router onto the lift, making sure it rests securely on the lift platform.
5. Using the lift, position the router in front of the rack or cabinet, centering it in front of
the large mounting shelf.
6. Carefully lower the router onto the shelf. The shelf ensures that the holes in the
mounting brackets align with the holes in the rack rails.
7. With one person pulling on the installation handle from the rear of the rack or cabinet
while another person pushes on the front-mounting flanges:
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Four-post rack or cabinet: Slide the chassis onto the mounting shelves until the
front-mounting flanges contact the spacer bars.
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Front-mounting in an open-frame rack: Slide the chassis onto the large mounting
shelf until the front-mounting flanges contact the rack rails.
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Center-mounting in an open-frame rack: Slide the chassis onto the large mounting
shelf until the center-mounting brackets contact the rack rails.
8. Move the lift away from the rack.
9. Install the mounting screws:
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Four-post rack or cabinet: Install a mounting screw into each of the holes aligned
with the threaded holes in the spacer bars.
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Open-frame rack: Install a mounting screw into each of the open mounting holes
aligned with the rack, starting from the bottom.
10. Reinstall the power supplies as described in the T640 Core Router Hardware Guide.
Figure 6: Components to Remove from the Rear of the Router
Lifting the Router into the Rack
WARNING: Do not lift the router using the installation handle or the handles
on the sides of the chassis. Use these handles only to help position the router.
Lifting the chassis and mounting it into a rack requires four people to lift and a fifth person
to secure the mounting screws. The empty chassis weighs over 205 lbs (64.7 kg).
1. Make sure the rack is in its permanent location and is secured to the building.
2. Insert the captive screws of the installation handle into the holes previously occupied
by the captive screws of the power supplies.
3. Move the router as close as possible to the rack. Use a pallet jack if one is available.
4. With two people in the front and two people in the back, hold the bottom of the chassis
and carefully lift it onto the large and small (if installed) mounting shelves.