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  Installing the Cisco 810 ISR
Figure 2-10 Universal Bracket Installed on the Cisco 812 ISR 
Ceiling Grip Clips
Use a ceiling grid clip to mount the router on a suspended ceiling. The ceiling grid clip that you need 
depends on the ceiling tiles on your ceiling. There are two types of ceiling grid clips: 
Ceiling Grid Clip, Recessed (AIR-AP-T-RAIL-R)—If your ceiling tiles hang below the ceiling grid, 
this clip provides the best fit between the router and the ceiling. 
Ceiling Grid Clip, Flush (AIR-AP-T-RAIL-F)—If your ceiling tiles are flush with the ceiling grid, 
this clip provides a snug fit between the router and the ceiling.
The standard 9/16, 15/16, and 1 ½-inch wide T-rail mounting are supported with the Ceiling Grip Clips. 
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Figure 2-11 shows a ceiling grid clip.
Figure 2-11 Ceiling Grid Clip 
Additional Adapters for Channel and Beam Ceiling Rails 
The most common type of suspended ceiling support rail (the support for the ceiling tiles) is the ceiling 
Tile rail or T-rail for short. You can attach a ceiling grid clip directly to a T-rail ceiling rail. However, 
other types of ceiling rails, such as channel rails and beam rails, require an additional adapter clip 
(AIR-CHNL-ADAPTER). You need two adapter clips for each router. Set screws on the clips hold them 
securely on the ceiling rail.
Figure 2-12 shows the three types of ceiling rails: T-rail, channel, and beam. Figure 2-13 shows the 
Cisco Access Point installed with mounting bracket, ceiling grid clip, and adapter clips.
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Figure 2-12 T-Rail, Channel, and Beam Ceiling Rail Types 
Figure 2-13 Adapter Clips Installed with Ceiling Grid Clips
Mounting the Cisco 812 ISR Below a Suspended Ceiling 
The recommended power option for the Cisco 812 ISR, when mounted below a suspended ceiling, is the 
Cisco C810-POE-SPL (PoE+ splitter) with the use of the supplied 1.3 meter power cable and Cat5 cable 
(Plenum rated). The cables can be hidden above the suspended ceiling for a clean installation. See the 
“Installing the Cisco PoE+ Splitter” section on page 2-2 for details on installing the PoE+ splitter.
Use a flat screwdriver if there is a need to remove the GE/console cables.
To mount the Cisco 812 ISR below a standard or recessed suspended ceiling, perform these steps.
Step 1Decide where you want to mount the router on your suspended ceiling.
Step 2Open the ceiling grid clip completely.
Step 3Place the ceiling grid clip over the T-rail and close it to the appropriate detent (A, B, or C).
Step 4Use a screwdriver to tighten the two ceiling grid clip locking screws to prevent the clip from sliding 
along the T-rail.
Step 5Observe the ceiling grid clip width detent letter (A, B, or C) that corresponds to the T-rail width.
Step 6Align the corresponding holes (A, B, or C) on the mounting bracket over the mounting holes on the 
ceiling grid clip.
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Step 7Hold the mounting bracket and insert a 6-32 x 0.18-inch screw into each of the four corresponding holes 
(A, B, or C) and tighten.
Step 8If necessary, drill or cut a cable access hole in the ceiling tile large enough for the Ethernet and power 
cables. Pull the cables through the access hole until you have about 1 foot of cable protruding from the 
hole.
Step 9(Optional). Use the ground screw to ground the router to a suitable building ground. See the “Grounding 
the Cisco 812 ISR” section on page 2-18 for general grounding instructions.
Step 10Connect the Ethernet and power cables to the router.
Step 11Align the router feet over the keyhole mounting slots on the mounting bracket. If you created a hole for 
the cables, make sure the router is positioned so that the cables reach their respective ports.
Step 12Gently slide the router onto the mounting bracket until it clicks into place. Figure 2-14 shows the 
Cisco 812 ISR mounted on a T-rail ceiling rail using a ceiling grid clip. 
						

							 
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Figure 2-14 Suspended Ceiling Mounting Details
Mounting the Cisco 812 ISR on a Hard Ceiling or a Wall
This procedure describes the steps required to mount the Cisco 812 ISR on a ceiling constructed of 
3/4-inch (19.05 mm) or thicker plywood using #8 fasteners using the universal mounting bracket 
(C810-BR-CM).
NoteThe Cisco 812 ISR integrated antennas perform best when the router is mounted on horizontal surfaces 
such as a table top or ceiling. For advanced features such as voice, location, and router detection, ceiling 
mounting is strongly recommended. However, for smaller areas such as conference rooms, kiosks, 
transportation environments, or hot-spot usage where data coverage is the primary concern, the unit may 
be wall mounted using wall anchors or screws.
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2 Ceiling T-rail 6 Power and GE cable routed through a ceiling 
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NoteWall mounting is only supported with the I/O (antenna) side facing up.
Step 1Use the mounting bracket as a template to mark the locations of the mounting holes on the bracket. 
Figure 2-15 shows details of the mounting bracket.
CautionBe sure to mark all four locations. To ensure a safe and secure installation, make sure you are using 
adequate fasteners and mount the router using no less than four fasteners.
CautionDo not use plastic wall anchors for ceiling installations. When mounting the router on a hard ceiling, use 
four fasteners capable of maintaining a minimum pullout force of 20 lbs (9 kg).
Figure 2-15 Universal Mounting Bracket Details 
Step 2
Use a #29 drill (0.1360 inch [3.4772 mm]) bit to drill a pilot hole at the mounting hole locations you 
marked.
NoteThe pilot hole size varies according to the material and thickness you are fastening. It is recommended 
to test the material to determine the ideal hole size for your mounting application.
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Step 3(Optional) Drill or cut a cable access hole near and below the location of the mounting bracket cable 
access cover large enough for the Ethernet cable, building ground wire, and power cables.
Step 4Pull approximately 9 inches of cable through the hole.
Step 5Route the Ethernet and power cables through the bracket before you attach the bracket to the ceiling or 
wall.
Step 6Route the cables through the main cable access hole and then through the smaller access hole as shown 
in Figure 2-16.
Figure 2-16 Routing the Ethernet and Power Cables 
Step 7
(Optional) Use the ground screw to attach the building ground wire to the ground location on the base 
of the router. See the “Grounding the Cisco 812 ISR” section on page 2-18 for the general grounding 
instructions.
Step 8Position the mounting bracket mounting holes (with indents down) over the pilot holes.
Step 9Insert a fastener into each mounting hole and tighten.
Step 10Connect the Ethernet and power cables to the router.
Step 11Align the router feet with the large part of the keyhole mounting slots on the mounting plate.
Step 12Gently slide the router onto the mounting bracket keyhole slots until it clicks into place.
Mounting the Cisco 812 ISR to a Network or Electrical Box 
To mount the Cisco 812 ISR to a network box or an electrical box, perform these steps:
Step 1Position the universal mounting bracket (C810-BR-CM) over the existing network or electrical box and 
align the bracket mounting holes with the box holes.
Step 2Hold the mounting bracket in place and insert a 6-32 x 0.18-inch pan head screw into each of the 
mounting holes and tighten.
Step 3Pull approximately 9 inches of Ethernet and power cable through the hole.
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Step 4Route the cables through the bracket before you attach the bracket to the ceiling.
Step 5Route the cables through the main cable access hole and then through the smaller access hole as shown 
in Figure 2-16.
Step 6(Optional) Use the ground screw to attach the building ground wire to the ground location on the base 
of the router. See the “Grounding the Cisco 812 ISR” section on page 2-18 for the general grounding 
instructions.
Step 7Connect the Ethernet and power cables to the router.
Step 8Align the router feet over the keyhole mounting slots on the optional mounting bracket.
Step 9Slide the router onto the optional mounting bracket until it clicks into place.
Grounding the Cisco 812 ISR
Grounding is not always required for indoor installations because the Cisco 812 ISR is classified as a 
low-voltage device and does not contain internal power supplies. However, it is recommended that you 
check your local and national electrical codes to see if grounding is a requirement. If grounding is 
required in your area or you wish to ground your router, perform the following steps:
WarningUse copper conductors only. Statement 1025
WarningThis equipment must be grounded. 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. Statement 1024
WarningWhen installing or replacing the unit, the ground connection must always be made first and 
disconnected last. Statement 1046
WarningThis equipment needs to be grounded. Use a green and yellow 14 to 18 AWG ground wire to connect 
the host to earth ground during normal use. Statement 242
Step 1Find a suitable building grounding point as close to the router as possible.
Step 2Connect a user-supplied ground wire to the building grounding point. The wire should be a minimum of 
#14AWG assuming a circuit length of 25 feet (30.5 cm). Consult your local electrical codes for 
additional information.
Step 3Route the ground wire to the router.
Step 4Attach the wire to a suitable grounding ring lug.
Step 5Crimp or solder the wire to the lug.
Step 6Use a Phillips screwdriver to remove the existing 6-32 screw at the grounding location as shown in 
Figure 2-17. 
						

							 
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Figure 2-17 Connecting the Ring Lug onto the Grounding Point
Step 7
Connect the ring lug to the router grounding point and reinstall the same 6-32 screw.
Installing the Cisco 819 ISR
This section describes the equipment and the procedures for successfully installing the Cisco 819 ISR 
and contains the following sections:
Equipment, Tools, and Connections, page 2-20
Installing the Router, page 2-22
Mounting the DC Power Supply, page 2-41
NoteFor compliance and safety information, see the Regulatory Compliance and Safety Information 
Roadmap that ships with the router and the Regulatory Compliance and Safety Information for Cisco 800 
Series Routers.
WarningRead the installation instructions before connecting the system to the power source. Statement 1004
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WarningThis equipment must be grounded. 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. Statement 1024
WarningOnly trained and qualified personnel should be allowed to install, replace, or service this equipment. 
Statement 1030
WarningNo user-serviceable parts inside. Do not open. Statement 1073
WarningUltimate disposal of this product should be handled according to all national laws and regulations. 
Statement 1040
WarningRead the wall-mounting instructions carefully before beginning installation. Failure to use the 
correct hardware or to follow the correct procedures could result in a hazardous situation to people 
and damage to the system. Statement 378
WarningThe covers are an integral part of the safety design of the product. Do not operate the unit without the 
covers installed. Statement 1077
WarningDo not locate the antenna near overhead power lines or other electric light or power circuits, or 
where it can come into contact with such circuits. When installing the antenna, take extreme care 
not to come into contact with such circuits, because they may cause serious injury or death. For 
proper installation and grounding of the antenna, please refer to national and local codes (for 
example, U.S.:NFPA 70, National Electrical Code, Article 810, Canada: Canadian Electrical Code, 
Section 54). Statement 1052
WarningThis product is not intended to be directly connected to the Cable Distribution System. Additional 
regulatory compliance and legal requirements may apply for direct connection to the Cable 
Distribution System. This product may connect to the Cable Distribution System ONLY through a 
device that is approved for direct connection. Statement 1078
Equipment, Tools, and Connections
This section describes the equipment, tools, and connections necessary for installing your Cisco 819 
ISR. It contains the following topics:
Items Shipped with your Router, page 2-21
Additional Items, page 2-21
Connections, page 2-21
Ethernet Devices, page 2-22