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The Cisco 678 is an asymmetric digital subscriber line (ADSL) router that provides home connectivity to an ADSL service provider (SP) network over an ADSL/ATM physical layer. The Cisco 678 ADSL router receives and transmits at rates up to the following adaptive rates:
| Encoding | Downstream/Upstream Rate (Mbps) |
|---|---|
DMT | 8.032/.864 |
CAP | 7.168/1.088 |
G.lite | 1.536/.512 |
The Cisco 678 ADSL router uses the Cisco Broadband Operating System (CBOS).
This list defines the hardware and software requirements necessary to install and configure the Cisco 678:
This section provides basic information necessary to install the Cisco 678. Refer to Chapter 2 of the Cisco 678 ADSL Router Installation and Operation Manual for detailed installation instructions and illustrations.
To connect the cables:
Step 1 Plug the power connector into the back of the unit.
Step 2 Connect the Ethernet cable to the ENET connector.
Step 3 If the computer at the customer premises has only a single Ethernet-equipped computer, attach the Cisco 678 to the computer's Ethernet adapter with the crossover cable provided. Otherwise, connect the Cisco 678 Ethernet port to an Ethernet hub using a straight-through cable.
Step 4 Connect the provided telephone cable to the Cisco 678 WALL connector and then connect the other end of the cable to the wall-mounted telephone connector.
Step 5 (Optional) Plug the microfilter into the PHONE connector, and plug the telephone into the microfilter.
A POTS splitter separates data signals from voice signals on your telephone line. The POTS splitter works by running a separate data line from the voice line, so that the Cisco 678 has a dedicated cable for data transmission.
The Cisco 678 ADSL Router Installation and Operation Guide shows a POTS splitter configuration. If you are using an external POTS splitter, connect the provided telephone cable to the wall connector that is labeled as going to the external POTS splitter.
In the EZ-DSL configuration, your telephone equipment is not connected to a POTS splitter. Without a POTS splitter and under certain circumstances, transient noise from the telephone can interfere with the operation of the Cisco 678, and the Cisco 678 can cause noise on the telephone line. To prevent this from happening, connect small microfilters to the telephone lines as shown in the Cisco 678 ADSL Router Installation and Operation Guide.
Figure 2-5 in the Cisco 678 ADSL Router Installation and Operation Guide shows a splitterless configuration. Make sure there is a microfilter connected to the line of each telephone that connects to your network.
Use EZ-DSL microfilters to connect telephones at the customer premises to the premises telephone wiring. The microfilters are designed to prevent interference between the Cisco 678 and the telephone set, as well as to reduce the effect of POTS-generated noise on the ADSL transceiver.
Step 1 Identify all home telephones plugged in and in service. Install an EZ-DSL microfilter at each home telephone.
Step 2 Unplug the telephone from the wall. Plug the telephone cord into the end of the EZ-DSL microfilter marked PHONE.
Step 3 Using the 3-inch telephone cord provided, plug one end of the cord into the microfilter marked WALL. Plug the other end of the cord into the telephone wall receptacle.
Step 4 After you complete the installation, verify that your telephone service works. If your telephone service does not work, disconnect the EZ-DSL microfilter and contact your local telephone company or Cisco Systems.
Having completed all the above procedures, you have now successfully installed your Cisco 678 and are ready to begin your configuration.
Your configuration requirements will vary depending on your SP. Contact your SP for detailed information regarding how to configure your Cisco 678 for optimal performance.
If the suggested course of action does not resolve your issue, contact your SP. For detailed information, refer to Chapter 4 of the Cisco 678 ADSL Router Installation and Operation Guide.
If you purchased your equipment through an outside or third-party vendor, please contact the vendor who supplied your equipment, or contact your SP for technical support information.
If you purchased your equipment directly from Cisco, contact the Cisco Technical Assistance Center, 24 hours a day, 7 days a week, at 800 553-2447 and at tac@cisco.com.
Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM is updated monthly. Therefore, it is probably more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.
Registered CCO users can order the Documentation CD-ROM and other Cisco Product documentation through our online Subscription Services at http://www.cisco.com/cgi-bin/subcat/kaojump.cgi.
Nonregistered CCO users can order documentation through a local account representative by calling Cisco's corporate headquarters (California, USA) at 408 526-4000 or, in North America, call 800 553-NETS (6387).
Posted: Sat Sep 28 00:30:03 PDT 2002
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