Vanguard Managed Solutions 6500 PLUS 6500PLUS Integral DSU, Hardware, Components, DSU Interface

Hardware

6500PLUS Integral DSU

Introduction	The 6500PLUS Integral DSU option is intended for use in installations
	requiring connection to a DDS interface, conforming to AT&T 62310 or ANSI
	T1E1.4/91-006, and running at a rate of 56 kbps. At present, this optional DSU
	interface is only available with VanguardMS 6500PLUS enclosures using a 25-pin D
	connector interface.
	The DSU option normally uses clocking derived from the network interface, but may
	also be configured to originate the clocking, thus providing the standard DSU and
	CSU loopbacks. Installation of the DSU option requires a hardware and software
	upgrade to the base 6500PLUS product.
Hardware
	The DSU option consists of two hardware modules, the Data Interface Module
Components	(DIM) and the External Interface Module (EIM).
DIM
	The DSU DIM is a small (approximately 1 in. x 3.5 in.) circuit card installed as a
	daughtercard onto the 6500PLUS processor card. The DIM module provides the
	proper power to the EIM and also performs the data translation functions.
EIM
	The EIM, shown in Figure 1-7,contains the telco interface circuitry portion of the

option.The EIM has an 18 in. cable with a 25-pin connection for interface with the 6500PLUS unit, and an RJ-48S jack for connection to the DDS line.

Example of an EIM Figure 1-7shows the EIM.

18-inch Cable

RJ-48S Jack

	DB25 Connector
	Figure 1-7. External Interface Module (EIM)
DSU Interface
	The DIM and EIM modules work cooperatively to provide a DSU interface and must
	be installed together for proper operation. These devices are only intended for use
	with VanguardMS 6500PLUS equipment.

About the 6500PLUS 1-17