Lucent Technologies 5 manual Merlin Legend Communications System Release

MERLIN LEGEND Communications System Release 5.0	Issue 1
System Manager’s Guide 555-650-118	June 1997
2 About the System
Data Communications Capabilities	Page 2-30

(Integrated Digital Services Network) communications device to an MLX extension. Group videoconferencing may require ExpressRoute 1000s, or an ISDN terminal adapter compatible with them, which may be provided with the videoconferencing application. A modem or other communications device can operate (with its data terminal, of course) from its own extension, with no telephone at the extension.

Desktop videoconferencing, data transfer, and screen-sharing applications work with Release 4.0 and later systems. They use any combination of PRI, NI-1 BRI, and T1 Switched 56 data lines/trunks. Such systems can stand alone, and some may also have an MLX telephone attached. Desktop videoconferencing systems can use one MLX B-channel or two (for acceptable video quality). If the system uses both MLX B-channels, you cannot use the phone connected to the same MLX port as the videoconferencing application while the desktop videoconferencing system is making or receiving calls. The use of two B-channels is called 2B data.