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This chapter provides information about videoconferencing, Cisco IP/VC 3500 family products, Cisco IP/VC 3525 Gateway features, and it provides a physical description of the Cisco IP/VC 3525 Gateway. The topics are as follows:
H.323 videoconferencing allows users using personal computers, IP telephones, and room-based systems to confer with another or with many other users across the office and around the world over IP networks. It is helping organizations make the transition to an Internet-driven world with instant worldwide connectivity. Spurred by changes in communications technology, low-cost bandwidth, plus continuous improvements in hardware and performance, videoconferencing solutions provide large and small enterprises, government institutions, and educational environments with the tools they need to be more productive, to make decisions faster, to train and educate more effectively, and to save time and avoid the burden of travel.
The Cisco IP/VC 3500 product family is part of the Cisco solution for videoconferencing over IP networks. The family comprises key infrastructure components that provide enterprises and service providers with reliable and easy-to-manage videoconference deployment. Cisco IP/VC 3500 family products support H.323 recommendations for videoconferencing on LANs and interoperability with H.320 WAN-endpoints. The Cisco IP/VC 3525 Gateway uses PRI interface to extend IP videoconferencing to WAN clients.
H.323 is the International Telecommunications Union (ITU) standard for real-time audio, data, and video communication over packet-based (IP) networks. It defines the IP-based videoconference components and modes of interaction. H.323 components are as follows:
The Cisco IP/VC 3500 product family consists of the products described in the following sections.
The Cisco IP/VC 3525 Gateway has the following features:
This section describes the front and rear panels of the Cisco IP/VC 3525 Gateway.
The Cisco IP/VC 3525 Gateway contains LEDs and a serial port that can be used for configuration and monitoring the unit via direct connection to a PC serial port or through a modem. Figure 1-1shows the Cisco IP/VC 3525 Gateway front panel.
Table 1-1 lists the LEDs that appear on the Cisco IP/VC 3525 Gateway and defines the indicator states for each LED.
| LED | Color | Indicates |
|---|---|---|
| LAN | Green Off | LAN link is present; port is connected to the network. Link not present. |
| WAN | Green | Selected port is in use. |
| Power | Green | Power is switched on. |
| Self Test | Orange | Gateway is in Power On Self Test, or is in reset during configuration. |
CD (Carrier Detect) | Green Off | Carrier received on line. |
| ACT (Active Session) | Green Off | Any call using this port. No sessions. |
| LBPK | --- | --- |
| ALRM | Green | Remote source indicates an error or the receiving port detects loss of signal, loss of frame, or excessive errors. Error-free connection with no alarm signals. |
For information on using the LEDs for problem solving, see the "LED Indications" section in the "Troubleshooting Tips" chapter.
The 9-pin EIA/TIA232 serial port on the front panel allows you to connect the Cisco IP/VC 3525 Gateway directly to a PC serial port. Using a terminal emulator you can configure the gateway's IP address, run the gateway diagnostics, and monitor the gateway status. Use the serial connection to assign the unit an IP address before you connect the unit to the network. Using the serial port to assign the IP address is described in the "Setting the IP Address" section in the "Installing the Hardware" chapter.
The Cisco IP/VC 3525 Gateway rear panel (see Figure 1-2) provides the LAN, WAN, and power connections.
The Cisco IP/VC 3525 Gateway has one 10/100BASE-T port with an RJ-45 sockets. The port supports 10 Mbps or 100 Mbps transfer rate and operates at half-duplex only. You must use category 5 network cable for 100 Mbps capability.
The Cisco IP/VC 3525 Gateway has one PRI WAN port for direct telephone connection. The port uses a proprietary PRI interface. The Cisco IP/VC 3525 Gateway PRI Cable Adapter kit is shipped with the unit. The adapter cable converts the proprietary configuration to the standard PRI configuration using an RJ48C connector.
Two alarm LEDs are associated with the PRI port. Table 1-2 defines the LED alarm indicator states.
| LED | Color | Indicates |
|---|---|---|
Red Alarm | Red | Gateway has lost frame alignment on the PRI line. |
Yellow Alarm | Yellow | Loss of frame alignment at the remote unit. |
The gateway power supply automatically adjusts to the supply voltage. The power supply supports 100V to 240V AC at 50/60 Hz.
Posted: Mon Jun 5 12:38:35 PDT 2000
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