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Cisco Video Surveillance IP PTZ Dome Camera User Guide, Cisco 2900 Series IP Dome
OL-24281-01
Chapter 1 Installation
Mounting
Note To take full advantage of the distance and noise immunity benefits of audio, you must use a
600-ohm impedance matching transformer and twisted pair cable (see Figure 1-7).
A stable power supply is required for optimal audio performance.
Figure 1-7 Connecting Audio to the TXB-N
Step 5 Reinstall the TXB-N:
a. Plug the TXB-N into the 16-pin connector located on the back box circuit board.
b. Secure the TXB-N to the standoff on the circuit board using the captive screw on the TXB-N.
Step 6 Plug your network Ethernet cable into the RJ-45 connector on the TXB-N to connect the dome to your
existing network.
1 Microphone 5 Line-Out Audio Twisted Pair Cable
2 Amplifier 6 600-Ohm Impedance Matching Transformer
3 600-Ohm Impedance Matching Transformer 7 Amplifier
4 Line-In Audio Twisted Pair Cable 8 Speaker