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Chapter 1. Understanding ISDN and the ISU 128
61202.029L2-1 ISU 128 User Manual
5
ENTER
123
456
789
#0
*
RS CS TD RD LD TR SR
ISU
CANCEL
ENTER
123
456
789
#0
*
RS CS TD RD LD TR SR
DSU
CANCEL
ENTER
123
456
789
#0
*
RS CS TD RD LD TR SR
DSU
CANCEL
DTE
DTE
DTE
DTE
ISU 128
2-Wire
SW56 DSU
4-Wire
SW56 DSU
ISDN U-Interface ISDN or SW56
ISDN U-Interface
TANT1
BONDING Compatible
Inverse MUX
Video Codec
NETWORK
Data Path
2-Wire Switched 56
4-Wire Switched 56 DSU
Figure 1-3
ISU 128 Interoperability