ADTRAN user manual ISU 512 Interoperability, Videoconferencing

ISDN SWITCH

Chapter 1: Understanding ISDN and the ISU 512

ISU 512 INTEROPERABILITY

Telephone networks are evolving from analog technologies to digital technol- ogies such as ISDN. This transition is time-consuming and costly for tele- phone companies and upgrading all locations and facilities is a lengthy process.

The ISU 512 bridges this transition by supporting communications with exist- ing and future network services and equipment. The ISU 512 supports com- munications with Switched 56 (SW56) Service and Switched 56 DSUs (2-wire and 4-wire) as well as various ISDN terminal adapters, ISDN terminal equip- ment, and BONDING Mode 1-compatible inverse multiplexers.

Figure 1-2 illustrates the ISU 512 (U interface) operation in various switched network services and customer premises products.

Videoconferencing

•Cost-effective video at 384 and

512kbps •Interoperates with

SW56 DSUs and dual port ISDN TAs at 112/128 kbps

Up to 4 BRI U-Interfaces	ISU 512	RS-530/V.35
	ISU 512
	*	V.35
Up to 4 BRI U-Interfaces	ISU 512

High-Speed File Transfers		ISU 512	512 kbps
•Image transfer			*
•Data backup	ISDN SWITCH		High-speed
			workstation

Up to 4 BRI U-Interfaces	ISU 512
Disaster Recovery - T1 Backup

•TSU with Dial Backup

ISU 512

Module (DBU)	*
•Up to 512 kbps of backup ISDN SWITCH	T1
bandwidth	V.35

Bridge/Router

ADTRAN T1 DSU/CSU,

TSU 100, OR TSU 600

Figure 1-2

ISU 512 (U interface) Applications

The ISU 512 (ST interface) will also support these configurations but will require an external NT1 for each BRI line.

4 ISU 512 User Manual 61202.086L1-1