ABB Relion 670 series - Communication Structure with PDH;SDH Port Synchronized; From Transceiver 21-219

are vendor dependent, but usually SDH MUX is to be set for re-timing, and the
format is to be set according to G.704 standard (framed, structured, unstructured,
and so on). The transparent format cannot be used in SDH telecommunication
networks because there is no synchronization available in the transceiver 21–219
SDH port.
LOCAL REMOTE
< 10 m
IED
Transceiver
21-219
SDH
MUX
IED
Multi-mode
fibre-optic
< 3.5 km
Galvanic
connection
interface
G.703 E1
(2Mbit)
SDH
master
Slaves
Slaves (external clock)
IEC07000156-1-en.vsdx
G.704 (framed etc.)
< 10 m
SDH
MUX
Multi-mode
fibre-optic
< 3.5 km
Galvanic
connection
interface
G.703 E1
(2Mbit)
Transceiver
21-219
IEC07000156 V1 EN-US
Figure 74: Communication structure with transceiver 21-219 port
synchronized from SDH master clock
IED
Terminal used for binary signal transfer
Transceiver 21–219 Optical-to-electrical interface converter
SDH MUX SDH multiplexer
5.5.3 Communication structure with PDH/SDH port synchronized
from transceiver 21-219
GUID-59042A8F-D4CA-41AA-A4B6-17B6A99E199A v1
Setting up a PDH telecommunication network requires that synchronization is
provided from an external source, for example, from one transceiver 21-219 (see
Figure
75). The SDH multiplexer (SDH MUX) is thus set not to interfere with
synchronization. This requirement is usually fulfilled by setting the SDH MUX to
transparent mode.
1MRK 505 382-UEN B Section 5
Communication set-up
Communication set-up 670/650 series 2.2 87
Application Guide