4-13
Cisco CVA122/CVA122E Hardware Installation Guide
OL-0799-02 (05/2001)
Chapter 4
Troubleshooting
Further Contacts
If connecting a single-line telephone, the cable can be either a two-wire or four-wire cable; when
connecting a two-line telephone, the cable must be a four-wire cable. In all cases, the cable must have
an RJ-11 connector on at least one end; the other connector depends on the device being connected.
Disconnect the cable at both ends and reconnect it, making sure the cable makes a firm and secure fit
at both ends. If this doesn’t help, replace the cable with a known good cable.
Step 6
Is the telephone, modem, or FAX device a dual-line telephone?
A dual-line telephone must be plugged into the “V1+V2” voice port. Single-line telephones can be
plugged into either voice port.
Step 7
Is the telephone, modem, or FAX device an analog (FXS) device that uses a tone pushbutton dial set?
The Cisco CVA122/CVA122E Cable Voice Adapter supports only analog devices that use tone dialing.
Step 8
Is the sum of the RENs of all devices on any one telephone line less than five?
If you have plugged multiple telephone, modem, or FAX devices into the same telephone line to use as
extensions, the sum of their Ringer Equivalence Numbers (REN) cannot exceed five. If this happens,
the phones might not ring properly or at all. See the documentation for each phone for its REN value.
Further Contacts
If you experience trouble with the startup that is not resolved with the procedures and tips in this
chapter, contact field service dispatch for further assistance and instructions. Also see the
documentation available in the Broadband Cable section on CCO and the Documentation CD-ROM.
Note
Cisco recommends that a CMTS systems engineer or network administrator be available,
or on-call, to assist field service technicians or installers in troubleshooting a
Cisco CVA122/CVA122E Cable Voice Adapter.
If you are a network administrator or systems engineer with a Cisco product covered under
warranty or a maintenance contract, contact Cisco’s Technical Assistance Center (TAC) at
800 553-2447, 408 526-7209, or [email protected].
