ETU-01(U) User Manual - CTC Union Technologies Co.,Ltd.

Chapter 1. IntroductionIn the previous application, the ETU01 is connected over hardwire point to point.The ETU01 can also be connected to an E1 network or to E1's provided by SDHequipment. Within the SDH network, the E1 can be cross mapped at the VC12 levelto provide point to point connections.Figure 1.7 E1 Point-to-Point over SDH ApplicationIn these cases the E1 timing will be set to "Recovery" to synchronize to the SDHnetwork's timing. In the following example, one unit will provide the E1 timing eitherby using its internal oscillator.Figure 1.8 Application with Channelized E116