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Cisco 2800 Series Quick Start Manual page 6

Cabling and setup
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Connect Telephone, Fax Machine, or Modem
Option B—Connecting Cisco 802 and Cisco 804 Routers
Figure 5
HU B
NO HU B
Cisco 804 router
Connect the red cable to the red ISDN U port.
Step 1
Connect the other end of the cable to the ISDN wall jack. If your wall jack has an RJ-11 connector,
Step 2
attach the RJ-45-to-RJ-11 adapter cable to the red cable, and then connect the RJ-11 connector to the
ISDN wall jack.
Connect Telephone, Fax Machine, or Modem
If you have a Cisco 803 or Cisco 804 router, you can connect a touch-tone telephone, fax machine, or
modem. Use the cables provided with these devices.
The gray PHONE 1 and PHONE 2 ports are RJ-11 connectors. If you are outside of North America, you
must buy and attach adapters that allow your telephones, faxes, or modems to be connected to these
RJ-11 connectors. In some countries, these adapters need additional electronics to convert the
telephones, faxes, or modems to work properly with the router phone ports. For example, in the United
Kingdom, you must buy an adapter that also provides a master socket, which causes incoming calls to
ring the connected devices. For information on recommended master sockets, see the Cisco 800 Series
Routers Hardware Installation Guide.
Caution
Do not connect the router telephone ports to the telephone wall jack. These ports are not meant for
direct connection to the public network. This connection can damage your router.
Option B—Connecting Cisco 802 and Cisco 804 Routers
6
Connecting an 802 or 804 Router to an ISDN Line
C is c o 8
ET HE RN
0 4
ET 10 BA
SE T
CO NS OL
E
IS DN U
0
1
PH ON E
2
3
1
2
ISDN wall jack
RJ-45-to-RJ-11
adapter cable
78-5374-03

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