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Chapter 1
Product Overview
The Cisco CVA122/CVA122E Cable Voice Adapter provides FXS (Foreign Exchange
Note
Station) services and supports analog phones, faxes, and modems. The
Cisco CVA122/CVA122E Cable Voice Adapter's voice ports do not support devices
requiring Foreign Exchange Office (FXO) services, such as PBX devices.
You can also connect multiple telephones, modems, and FAX devices to a single voice line. However,
each multiple device acts as an extension to that voice line, so only one call at a time can be made per
voice line. The Cisco CVA122/CVA122E Cable Voice Adapter supports multiple devices per voice line,
however, the total REN value for all devices must not exceed the maximum number given in
Appendix A, "Technical Specifications."
The REN value is a measure of the AC load that the device places on a voice line and is
Note
typically listed on each device. If too many devices are connected to the line, the
telephones might not ring properly, and you might have difficultly completing telephone
calls.
Telephones at each subscriber site must support touch-tone dialing; rotary dialing is not supported.
Special telephone features such as call waiting, forwarding, and conferencing are supported only if
using a Cisco IOS image that supports those particular features.
FAX devices—standard Group III and computer-based Group III machines up to 14,400
Note
baud—are supported.
In certain countries, the provisioning of voice telephony over the Internet or use of these
Caution
products may be prohibited and/or subject to laws, regulations or licenses, including
requirements applicable to the use of the products under telecommunications and other
laws and regulations; customer must comply with all such applicable laws in the country
where the customer intends to use the product.
Features
The Cisco CVA122/CVA122E Cable Voice Adapter is a compact, easy-to-install device that contains:
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•
•
Note
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OL-0799-02 (05/2001)
One F-connector interface to the cable system.
One RJ-45 (10BaseT half-duplex Ethernet) interface to connect a PC directly to the cable voice
adapter. If supported by the service provider, this port can connect an Ethernet hub, which then
connects to multiple PCs.
One USB device (type "B" connector) port to connect a PC directly to the cable voice adapter.
The Cisco CVA122/CVA122E Cable Voice Adapter does not support networking
multiple PCs using a USB bridging hub.
Two RJ-11 Foreign Exchange Station (FXS) ports to connect analog telephones, modems, and fax
devices to the cable system and IP backbone.
Cisco CVA122/CVA122E Hardware Installation Guide
Features
1-11
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Table of Contents
Troubleshooting
