Vanguard Managed Solutions Configurations, What Is the 650?, Supported, Protocols

Configurations	The Vanguard 650 Series currently comes in four hardware configurations:
	• 651 - Data only without internal modem or battery. This model comes with
	2 serial ports and one ISDN U interface port.
	• 652 -Data and Plain Old Telephone System (POTS). This model comes with
	(or without) battery backup, an internal modem, and is equipped with 2 serial
	ports, 2 POTS ports, and one ISDN U interface port.
	• 653 - Data only without internal modem or battery. This model comes with
	2 serial ports and one ISDN S/T Interface port.
	• 654 - Data and Plain Old Telephone System (POTS). This model comes with
	(or without) battery backup, an internal modem, and is equipped with 2 serial
	ports, 2 POTS ports, and one ISDN S/T interface port.
What Is the 650?
	Unlike a traditional ISDN Terminal Adaptor, the Vanguard 650 Series is known as an
	ISDN PAD (Packet Assembler/Disassembler). Although it has the same functionality
	as standard TA’s for POTS support, it handles data differently. The 650 product has
	an internal X.25 switching PAD, and can route data traffic across the ISDN D packet
	channel. As a result, multiple applications can be supported on a single ISDN basic
	rate (2B+D) link while freeing up the two B channels for true voice, modem, or fax
	calls.
Supported
	The Vanguard 650 Series of products provides full support for protocols such as
Protocols	SDLC, Bisync, Burroughs Poll Select, 2260, ALC, and 3201. (See the Software
	Advisory Notice for the currently shipping software release for a full list of supported
	protocols and features.) This product also provides support for local termination
	(Poll Spoofing), and switching.

1-2 Getting Started