21-216
(local)
TX
RX
RX
TX
RJ RJ
RX
TX
TX
RX
Multi-mode
optical fiber
E
IED
(local)
E
G.703
cable
< 10 m
IEC07000155-1-en.vsdx
Multi-mode
optical fiber
21-216
(remote)
IED
(remote)
IEC07000155 V1 EN-US
Figure 73: Communication structure for laboratory testing
5.5 PDH/SDH telecommunication via C37.94 interface
to transceiver 21-219
GUID-42A1D332-A59D-49F9-9821-719F3A993774 v1
5.5.1 Communication requirements
GUID-DCDF94BA-73EE-4970-86AB-676F1E53634D v1
PDH/SDH telecommunication network set-up can be done via 64 kbit/s or 2 Mbit/s
C37.94 interface to transceiver type 21-219.
Communication quality in PDH telecommunication networks is usually lower than
in SDH telecommunication networks due to less stable master clocks. The bit error
rate is typically BER10
-6
.
An SDH telecommunication network with an accurate master clock usually enables
high quality communication with very low bit error rate (BER10
-9
).
Communication system requirements are defined in Appendix
Sample specification
of communication requirements.
5.5.2 Communication structure with transceiver 21-219 port
synchronized from SDH master clock
GUID-0146A8BA-6425-43DE-8945-D1E18A1B82F3 v1
Setting up an SDH telecommunication network requires that transceiver 21-219
port is synchronized from the SDH network master clock (see Figure
74). The SDH
multiplexer (SDH MUX) must be configured to fulfil this requirement. The settings
Section 5 1MRK 505 382-UEN B
Communication set-up
86 Communication set-up 670/650 series 2.2
Application Guide
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