User manual

Chapter 5. Configuration Menu
61202156L1-1 TDU 120e User Manual 5-7
Normal (CSU) Timing
The typical timing option arrangement is shown in
Figure 5-7. The PBX is looped timed sending data to the TDU
120e which is actually synchronous to the received data. The
Network Interface (NI) is the actual source of all timings.
This timing option is the same as that typically used for
CSUs. This is the preferred mode for use with a PBX
application.
This timing mode works equally well when the PBX is the
source of timing. In that configuration the network would
not be providing timing.
Figure 5-7. Normal (CSU) Timing
U-BR1TE
The U-BR1TE timing selection works like Normal (CSU)
except that timing is derived from the U interface on port 1.1.
Set Line Buildout
Selects the line build-out for the network interface. In A
UTO
mode, the TDU 120e sets the LBO based on the strength of
the receive signal and displays the selected value. Choices:
0.0 dB, 7.5 dB, 15 dB, 22 dB, and Auto.
DTE
OSC
Secondary
Interface
(SI)
(OPTION)
Network
Interface
(NI)
T1 XMIT
T1 Receive
(DS1)
Nx56/64
DTE CLOCK
DS-1
PBX
(IO PB)
PBX
The network interface and secondary interface clocking options
are set by using the Network (NI) Configuration menu options.