Thanks to gruetzkopf we now already have 6 SDH ADM (add-drop multiplexers, specifically Ericsson/Marconi OMS860) deployed. We're using a SDH (synchronous digital hierarchy) backbone to transport the V5 interface of our #isdn between #EWSD and Access Multiplexers. See https://osmocom.org/projects/retronetworking/wiki/38C3_ISDN_Network_Architecture
#retronetworking #aufbauleaks
Overall architecture of the @c3isdn ISDN/PSTN network and its interconnections to @eventphone, @c3gsm etc: https://osmocom.org/projects/retronetworking/wiki/38C3_ISDN_Network_Architecture
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