Cisco VG420 Instruction Manual
Installing the Cisco VG420 Voice Gateway
This chapter provides the prerequisites and the procedure for installing the Cisco VG420 Voice Gateway in
an equipment rack.
•Prerequisites for the Installation, on page 1
•Unpack the Device, on page 3
•Mounting the Voice Gateway in Rack, on page 3
•Chassis Grounding, on page 9
Prerequisites for the Installation
Before installing the device, read the safety warnings and gather the required tools and equipment. For more
information about the required tools and equipment, see the Tools and Equipment section in this hardware
installation guide.
Safety Recommendations
Statement 371—Power Cable and AC Adapter
When installing the product, use the provided or designated connection cables, power cables, AC adapters,
and batteries. Using any other cables or adapters could cause a malfunction or a fire. Electrical Appliance and
Material Safety Law prohibits the use of UL-certified cables (that have the "UL" or "CSA" shown on the
cord), not regulated with the subject law by showing "PSE" on the cord, for any other electrical devices than
products designated by Cisco.
Warning
Statement 407—Japanese Safety Instruction
You are strongly advised to read the safety instruction before using the product.
https://www.cisco.com/web/JP/techdoc/pldoc/pldoc.html
When installing the product, please use the provided or designated connection cables/power cables/AC adapters.
Installing the Cisco VG420 Voice Gateway
1
Statement 1028—More Than One Power Supply
This unit might have more than one power supply connection. To reduce risk of electric shock, all connections
must be removed to de-energize the unit.
Warning
Statement 1030—Equipment Installation
Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
Warning
Statement 1024—Ground Conductor
This equipment must be grounded. To reduce the risk of electric shock, never defeat the ground conductor or
operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical
inspection authority or an electrician if you are uncertain that suitable grounding is available.
Warning
Statement 1046—Installing or Replacing the Unit
To reduce risk of electric shock, when installing or replacing the unit, the ground connection must always be
made first and disconnected last.
Warning
Statement 445—Connect the Chassis to Earth Ground
To reduce the risk of electric shock, the chassis of this equipment needs to be connected to permanent earth
ground during normal use.
Warning
Statement 338—Prevent Accidental Discharge
To prevent accidental discharge in the event of a power line cross, route on-premise wiring away from power
cables and off-premise wiring, or use a grounded shield to separate the on-premise wiring from the power
cables and off-premise wiring. A power line cross is an event, such as a lightning strike, that causes a power
surge. Off-premise wiring is designed to withstand power line crosses. On-premise wiring is protected from
power line crosses by a device that provides overcurrent and overvoltage protection. Nevertheless, if the
on-premise wiring is in close proximity to or not shielded from, the off-premise wiring or power cable during
a lightning strike or power surge, the on-premise wiring can carry a dangerous discharge to the attached
interface, equipment, or nearby personnel.
Warning
Installing the Cisco VG420 Voice Gateway
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Installing the Cisco VG420 Voice Gateway
Prerequisites for the Installation
Statement 1025—Use Copper Conductors Only
To reduce risk of fire, use copper conductors only.
Warning
Statement 1050—Power Module
Never install an AC power module and a DC power module in the same chassis.
Warning
Unpack the Device
Do not unpack the device until you are ready to install it. If the final installation site will not be ready for
some time, keep the chassis in its shipping container to prevent accidental damage. When you are ready to
install the chassis, proceed with unpacking it.
The chassis, accessory kit, publications, and any optional equipment you ordered may be shipped in more
than one container. When you unpack the containers, check the packing list to ensure that you received all of
the items on the list.
If anything appears damaged, or if you encounter problems when installing or configuring your system, contact
a customer service representative.
Mounting the Voice Gateway in Rack
You can install the Cisco VG420 Voice Gateway in 19-inch (48.26-cm) EIA and 23-inch (58.42-cm)
Southwestern Bell Corporation (SBC) racks. You can also mount the voice gateway in a 600-mm ETSI rack.
Use the standard brackets shipped with the hardware for mounting the chassis in a 19-inch EIA rack; you can
order optional larger brackets for mounting the chassis in a 23-inch SBC rack.
You can mount the voice gateway in the following ways:
• Center-front mounting: Brackets attached in the center front of the chassis with only the front panel
facing forward.
•Center-back mounting: Brackets attached in the center back of the chassis with only the back panel facing
forward.
• Front mounting: Brackets attached at the front of the chassis with the front panel facing forward.
• Back mounting: Brackets attached at the back of the chassis with the back panel facing forward.
Perform the following steps to mount the device on the rack:
Step 1 Attach the mounting brackets to the chassis as shown in the following images, using the screws provided.
Do not over-torque the screws. The recommended torque is 15 to 18 inch-lb (1.7 to 2.0 N-m).
Caution
Installing the Cisco VG420 Voice Gateway
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Installing the Cisco VG420 Voice Gateway
Unpack the Device
Figure 1: Attaching the Brackets to the Chassis
19-inch Rack Mount Bracket1
23-inch Rack Mount Bracket2
#6-32 Screws3
Step 2 Attach the second bracket to the opposite side of the chassis. Use a number-2 Phillips screwdriver to install the number-8
bracket screws.
Your chassis installation must allow unrestricted airflow for chassis cooling.
Attention
Step 3 Use the screws provided with the rack to install the chassis in the rack. For both the 19-inch EIA brackets and the 23-inch
SBC brackets, start the lower pair of screws first, and rest the brackets on the lower screws while you insert the upper
pair of screws.
Installing the Cisco VG420 Voice Gateway
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Installing the Cisco VG420 Voice Gateway
Mounting the Voice Gateway in Rack
Figure 2: I/O Side Mounting
Installing the Cisco VG420 Voice Gateway
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Installing the Cisco VG420 Voice Gateway
Mounting the Voice Gateway in Rack
Figure 3: PS and Middle Side Mounting
The screw slots in the brackets are spaced to line up with every second pair of screw holes in the rack. When the correct
screw holes are used, the small, threaded holes in the brackets line up with unused screw holes in the rack. If the small
holes do not line up with the rack holes, you must raise or lower the brackets to the next rack hole.
The following images represent rack mounting for the Cisco VG420 Voice Gateway:
Installing the Cisco VG420 Voice Gateway
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Installing the Cisco VG420 Voice Gateway
Mounting the Voice Gateway in Rack
Figure 4: Rack Mounting
Rack Mount Screw1
23-inch Rack2
Installing the Cisco VG420 Voice Gateway
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Installing the Cisco VG420 Voice Gateway
Mounting the Voice Gateway in Rack
Figure 5: Rack Mounting
Rack Mount Screw1
23-inch Rack2
Statement 1006—Chassis Warning for Rack-Mounting and Servicing
To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to
ensure that the system remains stable. The following guidelines are provided to ensure your safety:
• This unit should be mounted at the bottom of the rack if it is the only unit in the rack.
• When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the heaviest
component at the bottom of the rack.
• If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the unit
in the rack.
Warning
Statement 1018—Supply Circuit
To reduce risk of electric shock and fire, take care when connecting units to the supply circuit so that wiring
is not overloaded.
Warning
Installing the Cisco VG420 Voice Gateway
8
Installing the Cisco VG420 Voice Gateway
Mounting the Voice Gateway in Rack
Statement 1047—Overheating Prevention
To reduce the risk of fire or bodily injury, do not operate the unit in an area that exceeds the maximum
recommended ambient temperature of: 40 degrees C.
Warning
What to do next
After you install the voice gateway, you must connect the chassis to a reliable earth ground. For the chassis
ground connection procedures, see the Chassis Grounding section in this hardware installation guide.
Chassis Grounding
To install the ground connection for your router, perform the following steps:
Before you begin
Use a size 10 AWG (4 mm2) or larger copper wire and an appropriate user-supplied ring terminal with an
inner diameter of 1/4 in. (5–7 mm).
Step 1 Strip one end of the ground wire to the length required for the ring terminal.
Step 2 Crimp the ground wire to the ring terminal, using a crimp tool of the appropriate size.
Step 3 Attach the ground lug or ring terminal to the chassis as shown in the following image. Use one of the screws provided.
Tighten the screws to a torque of 8 to 10 in-lb (0.9 to 1.1 N-m).
Step 4 Connect the other end of the ground wire to a known reliable earth ground point at your site.
Figure 6: Chassis Grounding
In the above image, 1 indicates Ground Lug.
Installing the Cisco VG420 Voice Gateway
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Installing the Cisco VG420 Voice Gateway
Chassis Grounding
Installing the Cisco VG420 Voice Gateway
10
Installing the Cisco VG420 Voice Gateway
Chassis Grounding
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