October 2002
Intermediate to advanced
560 pages
12h 13m
English
Content preview from Cisco® Field Manual: Catalyst® Switch ConfigurationBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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14-1. Voice Ports
Inline power is provided to a powered device as follows:
- A phantom-powered device can be detected as a switch port becomes active.
- A powered device loops the transmit and receive pairs back so that the switch detects its own 340 kHz test tone.
- Power is applied to the port if the device is present; no power is applied if a normal Ethernet device is connected.
- Inline power is provided over pairs 2 and 3 (RJ-45 pins 1,2 and 3,6) at 48V DC.
Inline power is available on the following switch modules:
- Catalyst 6000 Inline Power 48-port 10/100 Ethernet Switch Module (WS-X6348-RJ45V)
- Catalyst 4000 Inline Power 48-port 10/100 Ethernet Switch Module (WS-X4148-RJ45V), with auxiliary DC power shelf and power entry module
- Catalyst 3524XL ...
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