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This chapters provides a information about videoconferencing, the Cisco IP/VC 3500 Series product, Cisco IP/VC 3520 Video Gateway features, and a physical description of the Cisco IP/VC 3520 Video Gateway. The topics are as follows:
Videoconferencing 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 Series product family is Cisco's videoconferencing solution. It is comprises several products that are developed for enterprises and service providers who want a reliable and easy to manage network infrastructure for videoconferencing applications deployment. Cisco videoconferencing products enable video applications over IP networks, and integrate legacy H.320 system, thus protecting enterprises' original investment in videoconferencing.
H.323 is the International Telecommunications Union (ITU) standard for real-time multimedia communications and conferencing over packet-based (IP) networks. Sending videoconferences over standard ISDN lines is expensive and prone to connectivity problems. Because of specialized, dedicated equipment needs, ISDN-based videoconferencing is often restricted to special sites and rooms. Network-based H.323 videoconferencing is the next-generation standard. H.323 is more cost-effective, offering greater flexibility and scalability: wherever there is a LAN connection, H.323 videoconferencing equipment will operate.
The H.323 specification defines a number of new network components that interoperate with other standards-compliant endpoints and networks by virtue of an H.323/H.32X gateway.
Following are the network components defined by the H.323 standard:
The Cisco IP/VC 3500 Series consists of the following products:
The Cisco IP/VC 3520 Video Gateway is a network hardware solution that allows audio, video and data conferencing to occur between H.323-compliant LAN endpoints and H.320-compliant terminals. The Cisco IP/VC 3520 Video Gateway translates H.323 and H.320 protocols so that LAN users can communicate with ISDN and PSTN users.
The Cisco IP/VC 3520 Video Gateway is also referred to throughout this document as the Video Gateway.
The Cisco IP/VC 3520 Video Gateway has the following features:
Your Cisco IP/VC 3520 Video Gateway is one of five 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 Video Gateway uses a common front panel for all models. The front panel contains LEDs and a serial port that can be used for configuration and monitoring the unit. Figure 1-1 shows the Cisco IP/VC 3520 Video Gateway front panel.
Table 1-1 list the LEDs that appear on the Cisco IP/VC 3525 Video Gateway and defines the indicator states for each LED.
| LED | Color | Indicates |
LAN | Green | LAN link is present; port is connected to the network |
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 |
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 Video Gateway directly to a PC and use a terminal emulator to assign the Video Gateway an IP address, to run diagnostics, and to monitor the Video Gateway's 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, "Setting the IP Address" in the "Installing the Hardware and Configuration Software" 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 10/100BaseT port with an RJ-45 sockets. The port allows for 10 Mbps or 100 Mbps bandwidths. You must use category 5 network cable for 100 Mbps capability.
The IPVC-3520-GW-2B has 1 BRI module and two RJ-45 socket for direct telephone connection.
The Video Gateway has an on/off Power switch and automatically adjusts to the supply voltage ranging from 100 to 240V AC, 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 10/100BaseT port with an RJ-45 sockets. The port allows for 10 Mbps or 100 Mbps bandwidths. You must use category 5 network cable for 100 Mbps capability.
The IPVC-3520-GW-4B has two BRI modules and RJ-45 socket for direct telephone connection.
The Video Gateway has an on/off Power switch and automatically adjusts to the supply voltage ranging from 100 to 240V AC, 50/60 Hz.
The 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 10/100BaseT port with an RJ-45 sockets. The port allows for 10 Mbps or 100 Mbps bandwidths. You must use category 5 network cable for 100 Mbps capability.
The IPVC-3520-GW-2V has 1 V.35 module with two V.25bis sockets. You must use EIA/TIA-366 cables for V.35 connections.
The Video Gateway has an on/off Power switch and automatically adjusts to the supply voltage ranging from 100 to 240V AC, 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 10/100BaseT port with an RJ-45 sockets. The port allows for 10 Mbps or 100 Mbps bandwidths. You must use category 5 network cable for 100 Mbps capability.
The IPVC-3520-GW-4V has 2 V.35 DTE modules and 4 V.25bis sockets. You must use EIA/TIA-366 cables for V.35 connections.
The Video Gateway has an on/off Power switch and automatically adjusts to the supply voltage ranging from 100 to 240V AC, 50/60 Hz.
The IPVC-3520-GW-2B rear panel (see Figure 1-6) provides the LAN, WAN, and power connections.
The IPVC-3520-GW-2B has one 10/100BaseT port with an RJ-45 sockets. The port allows for 10 Mbps or 100 Mbps bandwidths. You must use category 5 network cable for 100 Mbps capability.
The IPVC-3520-GW-2B2V has 1 BRI modules with two RJ-45 socket and one V.35 module with 2 V.25bis connectors. The BRI modules connect directly to the BRI telephone line. You must use EIA/TIA-366 cable for V.35.
The Video Gateway has an on/off Power switch and automatically adjusts to the supply voltage ranging from 100 to 240V AC, 50/60 Hz.
Posted: Thu Nov 11 20:46:16 PST 1999
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