Normal (Csu) Timing; Figure 1-8 Normal (Csu) - ADTRAN TSU 120 User Manual

Normal (CSU) Timing

T1 XMIT
( D S 1 )
T1 Receive
61200.129L1-1
The typical timing option arrangement is shown in
Figure 1-8. The PBX is looped timed sending data to
the TSU 120 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 net-
work would not be providing timing.
OSC
Network
Interface
(NI)
Nx56/64
DTE CLOCK
DTE
The network interface and secondary interface clocking
options are set by using the Network (NI) Configuration
menu options.
TSU 120 User Manual
Chapter 1. Introduction
Secondary
Interface
(SI)
(OPTION)
DSX
PBX
Normal (CSU)
(IO PB)
PBX
Figure 1-8
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