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This chapter provides information about videoconferencing, Cisco IP/VC 3500 family products, and Cisco IP/VC 3520 Gateway features; and it provides a physical description of the Cisco IP/VC 3520 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 3520 Gateway uses BRI and V.35 interfaces 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 3520 Gateway has the following features:
There are five Cisco IP/VC 3520 Gateway models:
The models use a common front panel. This section describes the common front panel and the rear panel of each model.
The Cisco IP/VC 3520 Gateway uses a common front panel for all models. The front panel contains LEDs and a serial port that you can use to configure or monitor the unit via direct connection to a PC serial port or through a modem. Figure 1-1 shows the Cisco IP/VC 3520 Gateway front panel.
Table 1-1 lists the LEDs that appear on the Cisco IP/VC 3520 Gateway and defines the indicator states for each LED.
| LED | Color | Indicates |
LAN | Green | |
Green | Selected port is in use. | |
Green | Power is switched on. | |
Orange | Gateway is in Power On Self Test, or is in reset during configuration. |
For information on using the LEDs for problem solving, see "LED Indications" in the "Troubleshooting Tips"chapter.
The 9-pin EIA/TIA-232 serial port on the front panel allows you to connect the Cisco IP/VC 3520 Gateway directly to a PC to use a terminal emulator to assign the Gateway an IP address, to run diagnostics, and to monitor Gateway status. We recommend that you use the serial connection to assign the unit an IP address before you connect it 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 IPVC-3520-GW-2B rear panel (see Figure 1-2) provides the LAN, WAN, and power connections.
The IPVC-3520-GW-2B has one 10/100BASE-T port with an RJ-45 sockets. The port allows for 10 Mbps or 100 Mbps bandwidths and operates at half-duplex only. You must use category 5 network cable for 100 Mbps capability.
The IPVC-3520-GW-2B has one BRI module with two RJ-45 sockets for direct ISDN connection.
The gateway power supply automatically adjusts to the supply voltage. The power supply supports 100V to 240V AC at 50/60 Hz.
The IPVC-3520-GW-4B rear panel (see Figure 1-3) provides the LAN, WAN, and power connections.
The IPVC-3520-GW-4B 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 IPVC-3520-GW-4B has two BRI modules with two RJ-45 sockets each for direct ISDN connection.
The gateway power supply automatically adjusts to the supply voltage. The power supply supports 100V to 240V AC at 50/60 Hz.
The Cisco IP/VC-3520-GW-2V rear panel (see Figure 1-4) provides the LAN, WAN, and power connections.
The IPVC-3520-GW-2V has one 10/100BASE-T port with an RJ-45 sockets. The port allows for 10 Mbps or 100 Mbps bandwidths and operates at half-duplex only. You must use category 5 network cable for 100 Mbps capability.
The gateway power supply automatically adjusts to the supply voltage. The power supply supports 100V to 240V AC at 50/60 Hz.
The IPVC-3520-GW-4V rear panel (see Figure 1-5) provides the LAN, WAN, and power connections.
The IPVC-3520-GW-4V has one 10/100BASE-T port with an RJ-45 sockets. The port allows for 10 Mbps or 100 Mbps bandwidths and operates at half-duplex only. You must use category 5 network cable for 100 Mbps capability.
The gateway power supply automatically adjusts to the supply voltage. The power supply supports 100V to 240V AC at 50/60 Hz.
The IPVC-3520-GW-2B2V rear panel (see Figure 1-6) provides the LAN, WAN, and power connections.
The IPVC-3520-GW-2B2V has one 10/100BASE-T port with an RJ-45 sockets. The port allows for 10 Mbps or 100 Mbps bandwidths and operates at half-duplex only. You must use category 5 network cable for 100 Mbps capability.
The IPVC-3520-GW-2B2V has one BRI module with two RJ-45 sockets and one V.35 module with two 26-pin female sockets. The BRI modules connect directly to the ISDN line. Two proprietary cable assemblies are shipped with the unit to use with the V.35 WAN ports. The cable assembly consist of two cables connected to a 26-pin male connector that plugs into the gateway WAN port socket. One cable has a Winchester connector for the V.35 interface. The other cable has a 25-pin male connector for EIA/TIA-366 signaling.
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 12:30:58 PDT 2000
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