General DataComm SpectraComm 553 Installation & Operation Manua page 73

Tests
Remote
Device
Figure 4-10
076R155-000
Issue 7
Cascade Interface
Analog
Receiver
Framer
TX
Driver
DTE
Interface
T1 Remote Test, Cascade Interface
SpectraComm 553 Fractional T1 DSU
Installation and Operation Manual
SC 553 DSU
Network Interface
TX
Driver
Framer
Network
Analog
Receiver
T1 Tests
4-9