Nortel Networks manual Table C-1 AN/DC Network Interfaces, Network Interface Description

		Technical Specifications
Table C-1.	AN/DC Network Interfaces
Network
Interface		Description
Ethernet and		Supports the Ethernet and IEEE 802.3 standards that provide LAN
Second Ethernet		connectivity.
		The Ethernet interfaces on an AN/DC include a 10Base-T (UTP) and
		an 802.3 AUI (XCVR) port; however, you can use only one port at a
		time.
		The UTP interface provides unshielded twisted-pair support; the
		XCVR interface provides broadband, baseband, fiber, and shielded
		twisted-pair support, depending on the transceiver and cabling you
		use.
Synchronous		Provides WAN connectivity. AN/DC models can have either two
		(COM1 and COM2) or three (COM1, COM2, and COM3)
		synchronous ports. (The third synchronous interface option is
		available on any AN/DC model that this guide describes.)
		Each port can operate independently with RS-232, RS-422, RS-449,
		V.28, V.35, and X.21 cables. Synchronous capability allows internal or
		external clocking.
ISDN BRI		Supports an S/T interface (an RJ-45 physical connector). The BRI
		provides 2 B channels, and supports full D-channel signaling and call
		setup/tear-down as defined in 1988 CCITT (now ITU-T) Q.921 and
		Q.931. For more information on ISDN, refer to Configuring Dial
		Services.
		Note that in the United States, an external NT-1 device is required to
		provide the U interface to the carrier network.
		The ISDN BRI option is available on any AN/DC model. Note that
		only one synchronous port, COM2, operates in AN/DC models that
		include ISDN BRI support.
Data Collection		Gathers RMON statistics. Refer to Connecting BayStack AN and
Module (DCM)		ANH Systems to a Network for information.

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