3 Installation

This chapter provides information about how to install the Acme Packet 3900 and its associated components.

Shipped Parts

Each Acme Packet 3900 ships in one box. Inside this box is the Acme Packet 3900 chassis and the accessory kit. The ordered modules are already installed in the chassis.

Table 3-1 Shipping Contents

Location	Item
Main Shipping Box	Acme Packet chassis
Accessory Kit	Console adapter AC or DC power cords, one per power supply Grounding cable Slide Rail Mounting Kit

Installation Tools and Parts

The following tools and parts are required to install the Acme Packet 3900 into your equipment rack:

• #2 Phillips-head screwdriver
• Small flat-head screwdriver
• Rack and associated mounting hardware
• Shielded Ethernet CAT5e or CAT6 RJ45 cables
• 11/32” nut driver
• 5/16" nut driver

Recommended Tools and Parts

Oracle recommends that you have the following parts on hand:

• Cable labels
• UPS for AC installations
• ESD wrist or heel straps
• ESD-safe location

Pre-Installation Guidelines

The Acme Packet 3900 must have access to reliable power and cooling. When choosing a location for your Acme Packet 3900, follow the guidelines listed in this section.

Environmental Guidelines

When preparing to install your Acme Packet 3900:

• Ensure that the equipment rack location complies with the environmental specifications (e.g., temperature, relative humidity, and maximum altitude) of the Acme Packet 3900 described in the chapter on Specifications.
• Locate the Acme Packet 3900 in a clean and well-ventilated room. This location should also be far from areas where heat, electrical noise, and electromagnetic fields are present.

Power Guidelines

When preparing to install your Acme Packet 3900, please ensure you do the following:

• Ensure that the installation location has access to adequate power and grounding. Separate circuits should be available for each of the Acme Packet 3900 two power supplies.
• The Acme Packet 3900 may only be powered by AC or DC circuits at one time; mixed power configurations are unsupported.
• Never use extension cords when powering a Acme Packet 3900.
• Use grounded, 3-conductor circuits.
• A local earth ground must be available.

Note:

Connect each of the Acme Packet 3900 power supplies to a separate circuit. If both supplies are connected to outlets on the same circuit, the Acme Packet 3900 will lose power to both supplies if that circuit loses power. In that case, the whole Acme Packet 3900 would lose power.

Mounting Guidelines

When preparing to install your Acme Packet 3900, please ensure you follow these mounting guidelines:

• Leave enough clearance, approximately 8” (20 cm), behind the equipment rack to allow adequate air ventilation, for ease in cabling, and to access the console connector.
• Do not block the air inlets or the fan module, or obstruct airflow to the system in any way.
• Position the equipment to allow for serviceability. This will aid in chassis removal, and prevent the need to remove or loosen other equipment in the rack.

Other Safety Guidelines

When preparing to install your Acme Packet 3900, ensure you follow these safety guidelines:

• Review all safety precautions with respect to the Acme Packet 3900 before beginning installation.
• Ensure that the equipment rack is securely bolted to the floor and that the equipment rack and components are properly grounded.
• For AC power installations, use a regulating UPS to protect the Acme Packet 3900 from power surges, voltage spikes, and power failures.
• For AC power installations, ensure that your UPS can supply power for enough time to save your system data and shut down the system gracefully.

Mounting Installation

This section explains how to unpack and install your Acme Packet 3900 into a telecommunications or server equipment rack. The Acme Packet 3900 standard mounting hardware is used for installation in a 4-post, 19” cabinet-style equipment rack. Mounting hardware for a 23” equipment rack is available by special order.

Mounting Options

The Acme Packet 3900 ships with hardware for mounting in a 4-post, tapped-hole equipment rack or square-hole equipment rack. The Acme Packet 3900 also ships with hardware for mounting in a 2-post, center-mount equipment rack. This section explains the procedures for each mounting option.

Caution:

Failure to follow the instructions outlined in this section might compromise the proper function of the Acme Packet 3900. To prevent personal injury, Oracle recommends that two people lift and install the chassis into the equipment rack.

Unpacking the Acme Packet 3900

To unpack the Acme Packet 3900:

1. Inspect the external packing materials and note if they are damaged in any way.
2. Open the exterior box.
3. Unpack the contents of the Acme Packet 3900 shipment.
4. Locate the packing list on the outside of the Acme Packet 3900 shipment box.
5. Confirm that all of the components listed in the packing list are present and in good condition.

If you discover that any of the parts are missing or were damaged in shipment, contact customer support.

Mounting Hardware

The hardware used for the Acme Packet 3900 mounting procedures include the following:

• Front mounting flanges (2) for use with mounting slide rails, used to secure the chassis into the rack

  

• Slide rail assembly (2), as shipped, with the chassis slide rail inserted into the equipment rack slide rail.

  

• Equipment rack slide rail (part of the slide rail assembly).

  

• Chassis slide rail (part of the slide rail assembly)

  

• Nut Bar (4)

  

• Mounting Spacer (2)

  

• Phillips screws and a flat head screw
• Center mounting flanges (2) for a 2-post rack

  

Cabinet-style 4-Post Chassis Installation

The following sections explain how to mount the Acme Packet 3900 in a cabinet-style, 4-post equipment rack.

Mounting System

Oracle provides flexible mounting options for your Acme Packet 3900 equipment rack installation.

The mounting system consists of a slide rail mounted on each side of an equipment rack and a chassis slide rail mounted on each side of the Acme Packet 3900 chassis. Once the slide rails are installed on the equipment rack and chassis, the chassis can be slid into place by aligning the installed chassis slide rails along the guides on the equipment rack slide rails. When the Acme Packet 3900 is fully inserted into the equipment rack, it is secured in place with two captive thumbscrews.

Installing the Equipment Rack Slide Rails

In the first stage of system installation, secure the equipment rack slide rail to the equipment rack. The equipment rack slide rail can expand and contract to accommodate equipment racks of various depths up to 32”.

You can mount the equipment rack slide rail to both tapped hole rack and square rack. Follow the appropriate procedure below.

Installing Slide Rails into a Tapped-Hole Rack

This section explains how to mount the Acme Packet 3900 slide rail assembly into a tapped-hole equipment rack.

Note:

The following procedure presumes that the tapped hole size is #10-32. If alternate tapped holes are used, the customer must supply the proper screws.

To install the slide rails to the front of a tapped-hole equipment rack:

1. Locate the following components:
   • Assembled equipment rack slide rails (2)
   • #10-32 x 5/8” screws (8)
   • Mounting spacers (2)
2. Line up the equipment rack slide rail with an appropriate mount point on the front of the equipment rack.
   
3. For both holes in the flange, place one #10-32 x 5/8” screw through the mounting spacer, then through the slide rail flange and into the tapped hole.
   
4. Using a #2 Phillips head screwdriver, tighten the screws to secure the slide rail to the equipment rack. Do not completely torque the screws; leave a small amount of play at this time.
   
5. Expand and line up the equipment rack slide rail on the outside of the rear rack slide rail at the same height used for the front mount point.
   
6. For both holes in the slide rail flange, place one #10-32 x 5/8” screw through the flange and into the tapped hole, and screw them into place.
   
7. Repeat Steps 2 and 6 for the other test equipment slide rail.
   

Installing Slide Rails into a Square-Hole Rack

This section explains how to mount the Acme Packet 3900 slide rail assembly into a square-hole equipment rack. The customer can use #10-32, 1/4-20, M5 or M6 cage nuts as an alternative, but the cage nuts will be customer-supplied along with the associated mounting screws for the cage nut selected.

To install the slide rails on the front of a square-hole equipment rack:

1. Locate the following components:
   • Equipment rack slide rails (2)
   • #10-32 x 5/8” screws (8)
   • Mounting spacers (2)
   • Nut bars (2)
2. Line up the painted side of the stationary rail with an appropriate mount point on the front of the equipment rack.
   
3. For each of the two holes in the slide rail flange, place a #10-32 screw through the mounting spacer, then through the slide rail flange, and finally through the square hole in the rack rail.
   
4. Hold the nut bar behind the front rack rail.
5. Using a #2 Phillips head screwdriver, tighten the screws to secure the slide rail to the equipment rack. Do not completely torque the screws; leave a small amount of play at this time.
   
6. Expand and line up the unpainted side of the stationary rail flange on the outside of the rear rack rail at the height used for the front mount point.
   
7. Hold the nut bar behind the rear rack slide rail.
8. Place one #10-32 screw through each of the holes in the slide rail flange, then through the square hole in the rack, and finally into the nut bar.
9. Using a #2 Phillips head screwdriver, tighten the screws securely into place.
   
10. Torque the screws on the front and back of the rail slide.
11. Repeat this procedure for the other slide rail.

Installing the Chassis Flanges and Slide Rails

In this second portion of system installation, two chassis flanges and two chassis slide rails are secured to the Acme Packet 3900 chassis.

To install the chassis rail slides on the Acme Packet 3900 chassis:

1. Locate the following components: #10-32 x 5/16” flat head (black) screws (4), Front-mounting flanges (2), #6-32 x 5/16” screws (6), #2 Phillips screwdriver, Chassis slide rails (2)
2. Line up one chassis flange with the tapped holes. Position the chassis flange’s spring-loaded thumbscrew toward the front panel of the system.
   
3. Insert 2 x #10-32 x 5/16” flat head screws into the flange and chassis, and using a #2 Phillips screwdriver, tighten the screws to secure the flange to the chassis.
   
4. Line up the chassis slide rail with the Acme Packet 3900 side panel. Position hole #4 closest to the flange at the front of the Acme Packet 3900 chassis. Line up the keyhole slot on the slide rail with the keyhole button on the side of the Acme Packet 3900 and slide the rail slightly backwards to secure the slide. When you do this, hole #5 on the slide will line up with the corresponding tapped holes on on the chassis
   
5. Use #6-32 x 5/16” screws to secure the chassis slide rail to the side of the Acme Packet 3900.
6. Repeat this procedure for the other side of the Acme Packet 3900 chassis.

Installing the Chassis in the Rack

The Acme Packet 3900 is now ready to be installed into a 4-post equipment rack. To prevent personal injury or damage to the Acme Packet 3900, follow these guidelines:

• This installation requires two people and should not be attempted otherwise.
• Follow your organization’s best practices for lifting and installing heavy components into an equipment rack.

• Ensure that the Acme Packet 3900 chassis remains supported until you have completely installed it into the equipment rack.

To install the Acme Packet 3900 chassis into the equipment rack:

1. Lift the Acme Packet 3900 into the correct position to prepare to be installed into the equipment rack.
2. Line up the chassis slide rails in back of the chassis with the guides in front of the equipment rack slide rails.
   
3. If necessary, press in the latches on either side of the Acme Packet 3900 in order for the assembly to slide into the guides.
4. Push the Acme Packet 3900 fully into the equipment rack.
5. Line up the chassis-mounted thumbscrews with the threads on the Acme Packet 3900 mounting spacer. You may have to adjust the spacer locations before they line up with the Acme Packet 3900’s captive screws.
   
6. Once correctly positioned, hand-tighten the thumbscrews into the mounting spacer and secure the chassis in the rack.
7. Torque the two captive thumbscrews using a #2 Phillips screwdriver.
8. Torque all four #10-32 x 5/8” front screws that hold the slide rails to the rack.

Center-Mount 2-Post Chassis Installation

The following sections explain how to center mount your Acme Packet 3900 into a 2-post equipment rack.

Installing the Center-Mount Hardware

Center-mounting flanges are attached to each side of the Acme Packet 3900. These mounting flanges are reversible, and are not mated to a specific side of the chassis. While the Acme Packet 3900 is shipped with all mounting hardware for attaching the rack flanges to the chassis, you must obtain and use the appropriate hardware recommended by the equipment rack manufacturer for mounting the system in the rack.

To install your Acme Packet 3900 in a center-mount configuration:

1. Locate the following components:
   • Center-mounting flanges (2)
   • #6-32 x 1/4” flat head screws (6)
2. Line up one chassis flange with the three tapped holes found along the center of the side of the Acme Packet 3900 chassis. The three screw holes of the chassis flange will only align in one direction.
   
3. Using a Phillips head screwdriver, tighten the three #6-32 x 1/4” flat head screws to secure the flange to the chassis.
   
4. Repeat this procedure for the other side of the Acme Packet 3900 chassis.

Installing the Chassis in the Rack

The Acme Packet 3900 chassis is now ready to be installed into a 2-post equipment rack. To prevent personal injury or damage to the Acme Packet 3900 follow these guidelines:

• This installation requires two people and should not be attempted otherwise.
• Follow your organization’s best practices for lifting and installing heavy components into an equipment rack.
• Ensure that the Acme Packet 3900 chassis remains supported until you have completely installed it into the equipment rack.

1. Locate the following components: Equipment rack screws (4)
2. Lift the Acme Packet 3900 into the correct position in the equipment rack.
3. Use a #2 Phillips screwdriver to secure two screws through the mounting flanges on the Acme Packet 3900 and into the equipment rack. One person should hold the Acme Packet 3900 in the correct position while the other person screws the Acme Packet 3900 in place.
4. Ensure that the Acme Packet 3900 chassis remains supported until you have completely installed it into the equipment rack.

Fan Module Installation

The fan module is pre-installed in the Acme Packet 3900 chassis when it ships. There is no need to remove the fan module prior to installation. In the event that this part needs service or replacement, you can remove and replace it with a functioning one.

Ground and Power Cable Installation

The Acme Packet 3900 must be properly grounded to ensure efficient performance. Grounding your Acme Packet 3900 chassis is an extremely important part of the installation and maintenance procedures. Physical harm or problems with system functionality may occur on the Acme Packet 3900 if it is not properly grounded. If your Acme Packet 3900 chassis is not properly grounded, the unit can exhibit unpredictable problems such as:

• Garbled output
• Sudden crashes
• Physical damage to the Acme Packet chassis and its hardware components

Caution:

Failure to ground the chassis properly can result in permanent damage to the Acme Packet 3900 and its components. Bodily harm may also result under some circumstances.

Caution:

The Acme Packet 3900 does not support mixing AC and DC power supplies in the same chassis. A mixed power configuration is prohibited.

Your equipment rack location must have a local earth ground. This ground can be either an unpainted spot on the grounded equipment rack frame, or a grounded bus bar in the equipment room.

Grounding Cable Installation

The chassis grounding terminals are located on the rear of the Acme Packet 3900 chassis, to the left of the USB ports. The Acme Packet 3900 ships with 2 kep nuts screwed onto the ground terminals. Use an 11/32” nut driver to remove and install these kep nuts.

This section shows you how to install the grounding cable on your Acme Packet 3900.

Important:

Acme Packet 3900 equipment is suitable for installation as part of a Common Bonding Network (CBN).

Note:

The Common Bonding Network (CBN) is a term used for the connection of building steel, water pipes, cable racks, vertical and horizontal equalizer conductors, bonding conductors and electrical metallic raceways within a building, when they are bonded together by either deliberate or incidental connections. The CBN is also connected to the building’s grounding electrode system. Connections to the CBN are usually made from equipment frames to reduce voltage differences to acceptable levels when current flows through these frames, either during fault occurrences in the AC or DC power systems, or when lightning strikes.

To install the grounding cable on the Acme Packet 3900:

1. Using an 11/32” nut driver, unscrew and remove the two kep nuts from the grounding posts located on the rear of the Acme Packet 3900. Place them aside.
2. Place the lug on the end of the grounding cable onto the grounding terminals.
3. Using an 11/32” nut driver, tighten the two kep nuts onto the grounding post, securing the grounding lug in place. When attached correctly, the grounding lug fits snugly between the chassis’s rear panel and the kep nuts.
4. Connect the other end of the grounding wire to a suitable grounding point at your site.

   Note:

   Always make the ground connection first and disconnect it last when installing or removing the system from an equipment rack.

AC Power Cord Installation

This section explains you how to install an AC power cord.

Note:

Use a 10 Amp fused circuit for each AC power supply.

Note:

This equipment is intended for installation in locations where National Electrical Code (NEC) applies.

To install the AC power cords in the Acme Packet 3900:

1. Locate the two AC power cords shipped with your Acme Packet 3900. Choose one power supply to work on first.
2. Connect one power cord to the power supply by inserting the 3-lead IEC-60320 plug into the IEC connector located on the power supply.
3. Connect the other power cord to the power supply by inserting the 3-lead IEC-60320 C13 plug into the IEC-60320 C14 IEC connector located on the power supply.
4. Route the AC power cords through your rack and cabling system to the power outlets.
5. Plug the supply end of each power cord into its own circuit.

   Note:

   To remove AC power cables from the Acme Packet 3900, reverse the previous steps in this procedure.
   --OR--
6. Set the System Power switch to the On position to provide power to the Acme Packet 3900. The Acme Packet 3900 will start to boot.

DC Power Cord Installation

This section explains you how to install a DC power cord.

Important:

This equipment is intended for installation in Network Telecommunication Facilities.

Caution:

Use a 30 Amp fused circuit for each DC power supply.

Caution:

Refer to the power supply’s polarity label when connecting it to a power source. Failure to do so can result in equipment damage or serious injury.

To install the DC power cords in the Acme Packet 3900:

1. Locate the DC power cord mating connector shipped with your Acme Packet 3900. Use this connector to fabricate a power cord as per your requirements. Choose one power supply to work on first.
2. Locate the DC power cords shipped with your Acme Packet 3900. Choose one power supply to work on first.
3. Using 5/16" nut driver, remove grounding nut from DC power supply and then use the same nut to secure #6 ring terminal from the DC cable.
4. Connect the plug from a 3-conductor power cord into the connector located on one of the DC power supplies.
5. Connect the plug from another 3-conductor power cord to the power connector located on the other DC power supply.
6. Route the DC power cords through your rack and cabling system to the power outlets.
7. Plug the supply end of each power cord into its own circuit.

   Note:

   To remove DC power cables from the Acme Packet 3900, reverse the previous steps in this procedure.
8. Set the Power Pushbotton on the front of the Acme Packet 3900. The unit will start to boot.

Cabling the Acme Packet System

After mounting the Acme Packet 3900 in an equipment rack and installing all components into the chassis, connect all appropriate data cables to the ports before powering the system up and configuring it.

Oracle recommends using fully shielded CAT5e or CAT6 Ethernet cables for media and management Ethernet connections to protect the Acme Packet 3900 from potential damage.

You can install and remove Ethernet and GbE optical cables while the Acme Packet 3900 is operational. Not every port needs to be utilized for proper operation. However, when a cable is disconnected and the link is lost, an alarm is generated.

Note:

The intra-building ports of the equipment are suitable for connection to intra-building or unexposed wiring or cabling only. The intra-building ports of the equipment must not be metallically connected to interfaces that connect to the Outside Plant (OSP) or its wiring. These interfaces are designed for use as intra-building interfaces only (Type 2 or Type 4 ports, as described in GR-1089–CORE, Issue 6) and requires isolation from the exposed OSP cabling. The addition of primary protectors is not sufficient protection to connect these interfaces metallically to OSP wiring.

Note:

Intra-building ports include Media and Signaling Network Interfaces, Network Management Ports, Alarm Ports, and Console Port.

Console Port

The Acme Packet 3900 has one console port located on the rear panel. The Acme Packet 3900 ships with a console adapter that allows you to connect a standard DB-9 serial port to the Acme Packet 3900’s RJ45 console port.

Chassis Console Cabling Procedure

This section explains how to create a serial connection to the Acme Packet 3900 console port. Use the serial management port for permanent connections to a terminal server or other serial device.

To connect a cable to the serial management port:

1. Locate a twisted pair console cable to connect to the Acme Packet 3900.
2. Remove the rubber dust cap from the Chassis console port if present.
3. Insert the RJ45 connector on the end of the console cable into the serial management port. The release tab on the RJ45 jack clicks into place when you insert it properly.
4. Lead the cable neatly away from the rear panel toward a terminal server or other component where this serial connection terminates.

Cabling the T1/E1 Port

If you purchased the optional four-port T1/E1 interface module for TDM, you must cable the T1/E1 port. In centralized SIP trunking topologies this module preserves voice services in the event of a corporate WAN connectivity disruption. In distributed SIP trunking topologies the module preserves voice services in the event of a local SIP trunk interface disruption.

Note:

The RJ48C connector looks very similar to an RJ45 connector found on a typical CAT5 cable, but they are very different. A RJ48C connecter is fastened on to an Shielded Twisted Pair (STP) cable, not the standard Unshielded Twisted Pair (UTP) CAT-(1-5) cable. An RJ48C also uses a different pin out arrangement, voltage level, and line capacitance than an RJ45.

To create a physical T1 or E1 connection to the Acme Packet 3900 T1/E1 port, use the rear ports marked T1/E1 for a permanent connection to Wide Area Network (WAN).

1. Insert the RJ48C connector on the end of the T1/E1 cable into the port labeled T1/E1.
2. Lead the cable neatly away from the rear panel toward the component where this connection terminates.

Management Network Ports

Standard shielded CAT5e or CAT6 (or higher) Ethernet cables with RJ45 jacks are used for connecting the Acme Packet 3900 management Ethernet ports to your network. These ports support 10/100/1000 Mbps speeds.

All management ports can be used to connect the Acme Packet to your LAN. If you are going to use High Availability (HA), use ports 1 and 2.

Note:

Keep Ethernet cables separated from power cables by at least 60mm where possible and never run them in the same channel of a trunking system without segregation.

Note:

As a rule, Mgmt0 should be reserved as the boot/maintenance interface. Mgmt1 and Mgmt2 are available for high availability.

To connect Ethernet cables to the rear panel Ethernet ports:

1. Locate the Ethernet cables you plan to connect to the Acme Packet 3900.
2. Insert the RJ45 connector on the end of the Ethernet cable into one of the management Ethernet ports. These ports are labeled Mgmt0, Mgmt1, and Mgmt2. The release tab on the RJ45 jack will click into place when you insert it properly.
3. Route the cable away from the Acme Packet 3900. Make sure that the Ethernet cables are not stretched tightly or subject to extreme stress.
4. Repeat Steps 1 through 3 for each additional management Ethernet cable you will connect to your Acme Packet 3900.
   

Media and Signaling Network Interfaces

This section explains how to cable for media and signaling. The rear panel is available with either copper or optical SFP Ethernet connectors. The media and signaling ports that can be configured are either any combination of P0, P1, P2, and P3; all of the ports are 10/100/1000 Ethernet ports.

Note:

Perform all cabling procedures according to the established standards for your organization.

1GbE Copper Cabling Procedure

Shielded CAT 5e or CAT 6 (or higher) Ethernet cables with RJ45 jacks are used for connecting the Acme Packet 3900 to your network over the signaling and media network ports.

To connect 1GbE Copper cables to the signaling and media ports:

1. Locate the Ethernet cables you plan to connect to the Acme Packet 3900.
2. Insert the RJ45 connector on the end of the Ethernet cable into one of the 1GbE copper NIU media and signaling ports. The release tab on the RJ45 jack will click into place when you insert it properly.
3. Route the cable away from the Acme Packet 3900. Make sure that the Ethernet cables are not stretched tightly or subjected to extreme stress.
4. Repeat Steps 1 through 3 for each additional Ethernet cable you connect to your Acme Packet 3900.

SFP Optical Cabling Procedure

This section explains how to cable an Acme Packet 3900 configured with optical interfaces. Standard single mode or multimode fiber optic cabling with duplex LC connectors are used to connect the Acme Packet 3900 to your network.

Fiber Optic Cable Handling

When handling a fiber optic cable:

• Never touch the polished end of fiber cable.
• To prevent serious eye damage, never look directly into a fiber optic cable connector or mating adapter.
• Clean all fiber optics before installing them into your network according to prescribed procedures.
• Ensure that the bend radius of your fiber cables is kept to a minimum of 3” or that specified by the fiber cable manufacturer.
• Perform all cabling procedures according to the established standards for your organization.

To connect network optical cabling to the optical physical interface cards:

1. Locate the fiber optic cables you plan to connect to the Acme Packet 3900.
2. Connect the optical cables to their corresponding ports.
3. Route the cable away from the Acme Packet 3900. Make sure that the fiber optic cables are not stretched tightly or subjected to extreme stress.
4. Repeat Steps 1 through 3 for each additional fiber optic cable you connect to your Acme Packet 3900.

Cabling for HA Deployments

The information and instructions in this section explain how to cable an HA node.

HA Cabling

Category 5 (or higher) shielded Ethernet cables are required for cabling two HA nodes together.

Rear Panel Cabling

You can use one or two connections for HA redundancy support between the two members of an HA node. Using two rear interfaces for sharing redundancy information provides a high level of reliability. As a rule, network management ports should be used in this way:

• Mgmt0 should be reserved as the boot/maintenance interface.
• Mgmt1 and Mgmt2 are available for sharing HA information.

Management network ports feature automatic crossover negotiation so that a crossover cable is not necessary for HA cabling.

1. Insert one end of an Ethernet cable into either Mgmt1 or Mgmt2 on the rear panel of the Acme Packet 3900 A. The release tab on the RJ45 jack clicks into place when you insert it properly.
2. Insert the other end of the Ethernet cable into the corresponding management interface on the rear panel of the Acme Packet 3900 B. The release tab on the RJ45 jack clicks into place when you insert it properly. If you use Mgmt1 on Acme Packet 3900 A, then you will connect it to Mgmt1 on Acme Packet 3900 B.
3. Refer to the configuration procedures located in the High Availability chapter of the Configuration Guide.

Dual Rear Interface Support

To cable Acme Packet 3900s in an HA configuration using dual rear interface support:

1. Insert one end of an Ethernet cable into Mgmt1 on the rear panel of Acme Packet 3900 A. The release tab on the RJ45 jack clicks into place when you insert it properly.
2. Insert the other end of the cable into the Mgmt1 port on the rear panel of Acme Packet 3900 B.
3. Insert one end of a second Ethernet cable into Mgmt2 on the rear panel of Acme Packet 3900 A.
4. Insert the other end of the cable into Mgmt2 on the rear panel of Acme Packet 3900 B.
5. Refer to the configuration procedures located in the HA Nodes chapter of the Configuration Guide.

Media Cabling for HA Nodes

Media cabling in an HA node depends on network topology. After a switchover between the two Acme Packet 3900s in an HA node, the standby system sends out an ARP message using a configured virtual MAC address, establishing that MAC on another physical port on the same Ethernet switch.