Port Numbering Conventions
The following are the port numbering conventions for the Cisco VG310 chassis and Cisco VG320 chassis:
•
An external compact flash card is numbered CF 0.
•
10/100/1000BASE-T ports are numbered 10/100/1000BASE-T 0/0 (bottom) and 10/100/1000BASE-T
0/1 (top).
•
(For Cisco VG310 chassis only)
—
FXS and E/M voice port numbering begins at 0/0/0 and extends to
0/0/23.
•
(For Cisco VG320 chassis only)
—
FXS and E/M voice port numbering begins at 0/0/0 and extends to
0/0/23 for FXS RJ-21 connector 1. For FXS RJ-21 connector 2, port numbering begins at 0/1/0 and
extends to 0/1/23. To locate the FXS voice ports, see
Physical Description and LEDs, on page 4
.
Hardware Features
This section describes the hardware features of Cisco VG310 and Cisco VG320 and includes the following:
•
Real-Time Clock, on page 8
•
USB Serial Console Port, on page 9
•
Removable and Interchangeable Modules and Cards, on page 9
Real-Time Clock
When the system powers up, the internal real-time clock with battery backup provides the system software
with the time of day. This allows the system to verify the validity of the certification authority (CA) certificate.
Cisco VG310 and Cisco VG320 have a lithium battery. This battery lasts for the duration of the life time of
Cisco VG310 or Cisco VG320 under the operating environmental conditions specified for the chassis, and is
not field replaceable.
If the lithium battery unit in Cisco VG310 and Cisco VG320 fails, the unit must be returned to Cisco for
repair.
Note
Built-In Interface Ports
The following table summarizes the interface ports built into the chassis.
Cisco VG310 and Cisco VG320 Voice Gateways Hardware Installation Guide
8
OL-31292-01
Overview of the Cisco VG310 and Cisco VG320 Voice Gateways
Port Numbering Conventions
