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Chapter 5. Configuration Menu
Normal (CSU) Timing
In the Normal (CSU) timing mode, the Receive Clock is derived
from the network, while the Transmit Clock is derived from the
PBX or other alternative timing source, connected to the Sec-
ondary interface (e.g., Drop and Insert or DSX-1). This timing
option is the same as that typically used for CSUs. This is the
preferred mode for use with a PBX application.
T1 XMIT
( D S 1 )
T1 Receive
U-BR1TE
The U-BR1TE timing selection works like Normal (CSU) except
that timing is derived from the U interface on port 1.1.
5-10
OSC
Network
Interface
(NI)
Nx56/64
DTE CLOCK
DTE
Figure 5-6. Normal (CSU)
The network interface and Secondary Interface Clocking Options
are set by using the Network (NI) Configuration Menu Op-
tions. Either a DSX-1 Option Module or a Drop and Insert
Option Module must be installed in the TSU 100 for this mode
to function.
TSU 100 User Manual
Secondary
Interface
(IO PB)
(SI)
(OPTION)
61202052L1-1
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