Data Path For Network Line Loopback; Network Line Loopback, Front Panel Control - General DataComm DeskTop T1 Installation And Operation Instruction Manual

4-12
DTE or
other
signal
source
When DSU is optioned for bilateral loopbacks (switch S10-4)
a DTE Local Loopback is also initiated when Network Line
Loopback is commanded.
Figure 4-7 Data Path for Network Line Loopback
3. TM, T1, and LL indicators are
On during the test.
General Data-
ON SD RD
Comm
DeskTop
T1
1. T1 indicator must be On; press T1
switch if indicator is not already On.
Figure 4-8 Network Line Loopback, Front Panel Control
GDC 048R154-000
Network Line Loopback
DeskTop T1 DSU
DTE Network
Interface Interface
OOF LOS BPV ALM TM T1
2. Press LL switch to start Network Line
Loopback. Press switch again to end
test.
Diagnostics
Network
ST LL RL