B-5
Cisco CVA122/CVA122E Hardware Installation Guide
OL-0799-02 (05/2001)
Appendix B Connector and Cable Specifications
Voice Port Connectors
The USB connector requires a cable that meets the USB specification’s requirements for a “Full-speed”
detachable cable:
•
One end of the cable must have a host (type “A”) overmolded plug and the other end of the cable
must have a device (type “B”) overmolded plug.
•
The cable cannot exceed 5 meters in length.
•
The signal lines (D+ and D-) must be a twisted pair (28 AWG).
•
Power and Signal Ground lines are non-twisted (20 to 28 AWG).
•
The Shield must contain a 28 AWG tinned copper drain wire.
Note
See Chapter 6, “Mechanical,” in the Universal Serial Bus Specification Revision 1.1 for
complete connector and cable details. The specification is available at the USB
Implementers Forum, Inc. web site at http://www.usb.org.
Voice Port Connectors
This section contains pinout and connection information for the two voice ports on the
Cisco CVA122/CVA122E Cable Voice Adapter. The voice ports use standard voice connectors (six pins
with RJ-11 connectors) and straight-through four-wire cables.
Note
The service provider must enable and configure the Cisco CVA122/CVA122E Cable Voice
Adapter for voice services before you can use the voice ports to make Voice over IP (VoIP)
calls.
Table B-4 lists the signals used on the voice ports.
Table B-4
Voice Port Signals
Connector
Pin
Signal
Description
V1+V2
1
NC
Not connected.
2
TIP 2
RING connection for second pair of 4-wire voice
port V1+V2. This is connected in parallel with voice
port V2 RING.
3
RING
RING connection for first pair of 4-wire voice port
V1+V2. This is the voice port V1 RING connection.
4
TIP
TIP connection for first pair of 4-wire voice V1+V2.
This is the voice port V1 TIP connection.
5
RING 2
TIP connection for second pair of 4-wire voice port
V1+V2. This is connected in parallel with voice port
V2 TIP.
6
NC
Not connected.
