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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

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

IS DN U

PH ON E

ISDN wall jack

RJ-45-to-RJ-11

adapter cable

78-5374-03