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PTX3000 Site Guidelines and Requirements

PTX3000 Environmental Specifications

Table 1 specifies the environmental specifications required for normal PTX3000 operation. In addition, the site should be as dust-free as possible.

Table 1: PTX3000 Environmental Specifications




No performance degradation to 10,000 ft (3048 m)

Relative humidity

Normal operation ensured in relative humidity range of 5% through 90%, noncondensing


Normal operation ensured in temperature range of 32°F (0°C) through 104°F (40°C)

Nonoperating storage temperature in shipping crate: –40°F (–40°C) through 158°F (70°C)


Designed to meet Telcordia Technologies Zone 4 earthquake requirements

Maximum thermal output

20,634 BTU/hr (6051 W)


Install the PTX3000 only in restricted-access areas, such as dedicated equipment rooms and equipment closets, in accordance with Articles 110-16, 110-17, and 110-18 of the National Electrical Code, ANSI/NFPA 70.

General Site Guidelines

Efficient device operation requires proper site planning and maintenance. It also requires proper layout of the equipment, rack or cabinet, and wiring closet.

To plan and create an acceptable operating environment for your device and prevent environmentally caused equipment failures:

  • Keep the area around the chassis free from dust and conductive material, such as metal flakes.

  • Follow prescribed airflow guidelines to ensure that the cooling system functions properly. Ensure that exhaust from other equipment does not blow into the intake vents of the device.

  • Follow the prescribed electrostatic discharge (ESD) prevention procedures to prevent damaging the equipment. Static discharge can cause components to fail completely or intermittently over time.

  • Install the device in a secure area, so that only authorized personnel can access the device.

PTX3000 Chassis Grounding Cable and Lug Specifications

To meet safety and electromagnetic interference (EMI) requirements and to ensure proper operation, the PTX3000 must be adequately grounded before power is connected.

Two 1/4"-20 thread, 1/2" long studs are provided on the right flange of the chassis for connecting the PTX3000 to earth ground. The grounding points are spaced at 0.625-in. (15.86-mm) centers.


You must install the PTX3000 in a restricted-access location and ensure that the chassis is always properly grounded. The PTX3000 has a two-hole protective grounding terminal provided on the chassis. We recommend that you use this protective grounding terminal as the preferred method for grounding the chassis regardless of the power supply configuration. However, if additional grounding methods are available, you can also use those methods. For example, you can use the grounding wire in the AC power cord or use the grounding terminal or lug on a DC power supply. This tested system meets or exceeds all applicable EMC regulatory requirements with the two-hole protective grounding terminal.

The accessory box shipped with the PTX3000 includes:

  • Two acorn nuts to secure the grounding cable to the grounding points.

  • One 4-AWG (21 mm2) cable lug used to secure the grounding cable to the grounding points.


    The cable lug shown in Figure 1 can also used for the DC power cables.


Before PTX3000 installation begins, a licensed electrician must attach a cable lug to the grounding cable that you supply. A cable with an incorrectly attached lug can damage the PTX3000.

Figure 1: Grounding Cable Lug Grounding Cable Lug

You must supply a grounding cable. Table 2 summarizes the specifications for the grounding cable and lug.

In addition, GR1089-CORE requires the following:

  • The grounding conductor must be copper.

  • Bare conductors shall be coated with an antioxidant before crimp connections are made.

  • Plated areas that are electrically connected to the grounding conductor shall be cleaned and free of contaminants before the connection is made.

Table 2: Grounding Cable Specifications




6-AWG (13 mm2), minimum


You can also use a 4-AWG (21 mm2) grounding cable.


Cable lug; dual hole, sized to fit 1/4-20 UNC terminal studs at 15.86-mm (0.625-in.) center line.

PTX3000 Clearance Requirements for Airflow and Hardware Maintenance

When planning the installation site, allow sufficient clearance around the rack (see Figure 2):

  • For the cooling system to function properly, the airflow around the chassis must be unrestricted.

  • For service personnel to remove and install hardware components, there must be adequate space at the front of the chassis. At least 24 in. (61.0 cm) is required in front of the PTX3000. NEBS GR-63 recommends that you allow at least 30 in. (72.6 cm) in front of the rack.

  • Additional clearance is required to accommodate the depth of the cable management system: 1.9 in. (4.8 cm) additional depth in the front of the chassis.

  • The compact form-factor of the chassis allows up to four PTX3000 routers to be installed in a single four-post rack. For all configurations, there must be at least 10 in. (25.4 cm) between the PTX3000 and neighboring devices to the side, and there must be no obstruction above the chassis that prevents airflow. Depending on your installation, the required clearance at the rear of the chassis varies:

    • A standalone PTX3000 requires 2 in. (5.1 cm) of clearance at the rear (see Figure 2).

    • Two PTX3000 routers installed back-to-back require 4 in. (10.2 cm) of clearance between the routers at the rear.

    • Four PTX3000 routers installed back-to-back and stacked in a single rack require 10 in. (25.4 cm) of clearance between the routers at the rear (see Figure 3).


    These requirements have been designed to provide adequate cooling in deployments with ambient temperatures up to 104°F (40°C).

Figure 2: Chassis Dimensions and Clearance RequirementsChassis Dimensions and Clearance Requirements
Figure 3: Four Routers Installed Back-to-BackFour Routers Installed Back-to-Back
Upper chassis 1
Lower chassis 1
Upper chassis 2
Lower chassis 2

PTX3000 Physical Specifications

Table 3 lists the physical specifications for the PTX3000 chassis and components.

Table 3: Physical Specifications






Chassis with backplane and cable management system

78.2 lb (35.5 kg)

38.5 in. (97.8 cm)

17.6 in. (44.7 cm) (excluding the mounting flanges)

8.7 in. (22.1 cm) (from mounting flange to chassis rear)

10.6 in. (26.9 cm) (including the cable management system)

Control Board

3.1 lb (1.4 kg)

11.1 in. (28.2 cm)

1.7 in. (4.3 cm)

7.8 in. (19.8 cm)

Routing Engine

2.8 lb (1.3 kg)

10.3 in. (26.2 cm)

1.7 in. (4.4 cm)

6.9 in. (17.5 cm)

Routing and Control Board

3.75 lbs ( 1.7 kg)

11.1 in. (28.2 cm)

1.7 in. (4.3 cm)

7.8 in. (19.8 cm)

Routing and Control Board companion card

1.17 lb (0.53 kg)

10.3 in. (26.2 cm)

1.7 in. (4.4 cm)

6.9 in. (17.5 cm)

Craft interface

0.4 lb (0.2 kg)

3.8 in. (9.6 cm)

1.4 in. (3.5 cm)

7.8 in. (19.8 cm)


  • FPC-SFF-PTX-P1-A: 5.9 lb (2.7 kg)

  • FPC-SFF-PTX-T: 5.9 lb (2.7 kg)

  • FPC3-SFF-PTX: 10.5 lb (4.8 kg)

11.1 in. (28.2 cm)

1.7 in. (4.3 cm)

7.8 in. (19.8 cm)


  • P1-PTX-24-10GE-SFPP: 3.7 lb (1.7 kg)

  • P1-PTX-24-10G-W-SFPP: 2.5 lb (1.1 kg)

  • P2-10G-40G-QSFPP: 4.3 lb (2 kg)

  • P1-PTX-2-40GE-CFP: 3.5 lb (1.6 kg)

  • P3-24-U-QSFP28: 3.5 lb (1.6 kg)

  • P1-PTX-2-100GE-CFP: 3.5 lb (1.6 kg)

  • P2-100GE-OTN: 4.4 lb (2 kg)

  • P1-PTX-2-100G-WDM: 5.5 lb (2.5 kg)

11.1 in. (28.2 cm)

1.7 in. (4.3 cm)

7.8 in. (19.8 cm)

Blank panel for FPC and PIC slots

1.3 lb (0.6 kg)

11.1 in. (28.2 cm)

1.7 in. (4.3 cm)



  • PTX-IPLC-B-32: 6.3 lb (2.85 kg)

  • PTX-IPLC-E-32: 3.3 lb (1.49 kg)

11.1 in. (28.2 cm)

1.7 in. (4.3 cm)

7.8 in. (19.8 cm)


4.6 lb (2.1 kg)

3.5 in. (8.9 cm)

3.4 in. (8.7 cm)

10.1 in. (25.7 cm)


4.5 lb (2.0 kg)

3.5 in. (8.9 cm)

3.4 in. (8.7 cm)

10.1 in. (25.7 cm)


  • SIB-SFF-PTX-240: 1.5 lb (0.7 kg)

  • SIB3-SFF-PTX: 1.9 lb (0.9 kg)

3.9 in. (10 cm)

1.7 in. (4.3 cm)

7.8 in. (19.8 cm)

Fan tray

7.5 lb (3.4 kg)

2.5 in. (6.4 cm)

17.3 in. (43.8 cm)

7.8 in. (19.8 cm)

Air filter

1.0 lb (0.5 kg)

Site Electrical Wiring Guidelines

Table 4 describes the factors you must consider while planning the electrical wiring at your site.


You must provide a properly grounded and shielded environment and use electrical surge-suppression devices.

Avertissement Vous devez établir un environnement protégé et convenablement mis à la terre et utiliser des dispositifs de parasurtension.

Table 4: Site Electrical Wiring Guidelines

Site Wiring Factor


Signaling limitations

If your site experiences any of the following problems, consult experts in electrical surge suppression and shielding:

  • Improperly installed wires cause radio frequency interference (RFI).

  • Damage from lightning strikes occurs when wires exceed recommended distances or pass between buildings.

  • Electromagnetic pulses (EMPs) caused by lightning damage unshielded conductors and electronic devices.

Radio frequency interference

To reduce or eliminate RFI from your site wiring, do the following:

  • Use a twisted-pair cable with a good distribution of grounding conductors.

  • If you must exceed the recommended distances, use a high-quality twisted-pair cable with one ground conductor for each data signal, when applicable.

Electromagnetic compatibility

If your site is susceptible to problems with electromagnetic compatibility (EMC), particularly from lightning or radio transmitters, seek expert advice.

Strong sources of electromagnetic interference (EMI) can cause:

  • Destruction of the signal drivers and receivers in the device,

  • Electrical hazards as a result of power surges conducted over the lines into the equipment.

Rack Requirements for the PTX3000

Rack Size and Strength

The PTX3000 is designed for installation in a rack that complies with either of the following standards:

  • A 19-in. rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the Electronics Components Industry Association (

  • A 600-mm rack as defined in the four-part Equipment Engineering (EE); European telecommunications standard for equipment practice (document numbers ETS 300 119-1 through 119-4) published by the European Telecommunications Standards Institute ( The horizontal spacing between the rails in a rack that complies with this standard is usually wider than the mounting brackets, which measure 19 in. (48.3 cm) from outer edge to outer edge. Use approved wing devices to narrow the opening between the rails as required.

The rack rails must be spaced widely enough to accommodate the chassis's external dimensions: 38.5 in. (97.8 cm) high, 8.7 in. (22.1 cm) deep, and 17.6 in. (44.7 cm) wide. The cable management system on the front of the chassis adds 1.9 in. (4.8 cm) to the depth, for a total depth of 10.6 in. (26.9 cm). The outer edges of the mounting brackets extend the width to 19 in. (48.3 cm).

The spacing of rails and adjacent racks must also allow for the clearances around the chassis and rack that are specified in PTX3000 Clearance Requirements for Airflow and Hardware Maintenance.

The chassis height of 38.5 in. (97.8 cm) high is approximately 22 U. A U is the standard rack unit defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the Electronics Industry Association. You can install one chassis in a rack that has at least 22 U of usable vertical space.

The compact form-factor of the chassis allows up to four PTX3000 routers to be installed in a single four-post rack. Depending on your installation, the required clearance at the rear of the chassis varies, see PTX3000 Clearance Requirements for Airflow and Hardware Maintenance for more information.

The rack must be strong enough to support the weight of the fully configured PTX3000, up to about 310 lb (140.6 kg).

Figure 4: Typical Open-Frame RackTypical Open-Frame Rack

Spacing of Mounting Bracket and Flange Holes

The holes in the mounting brackets and front-mount flanges used to attach the chassis to a rack are spaced at 3 U (5.25 in. or 13.3 cm). The PTX3000 can be mounted in any rack that provides holes spaced at those distances.

Connection to Building Structure

Always secure the rack to the structure of the building. If your geographical area is subject to earthquakes, bolt the rack to the floor. For maximum stability, also secure the rack to ceiling brackets.