OSN3500 Device ADL4_2*STM-4 Single Board Basic Description

The functional version of OSN3500 equipment SDH/ATM single board ADL4 single board is N1, which is mainly applied to SDHATM switching and transmission network.

transmission networks, providing service types that can carry various SDH and ATM services.

The OSN3500 device ADL4 single board supports the following two kinds of SDH/ATM service applications: ① SDH/ATM service applications with exclusive bandwidth. ② SDH/ATM service application with shared bandwidth. SDH/ATM Service Application with Exclusive Bandwidth

When the bandwidth is not shared, SDH/ATM services are processed at the SDH/ATM layer only between the source and the host network elements through the SDH/ATM service processing board. No SDH and ATM layer processing is performed on the intermediate network elements through which the service passes, and only SDH time slot penetration is performed. In this case, each SDH/ATM service shares the VC-3/VC-4 channel exclusively. Each SDH/ATM service can be aggregated at the center node and then converged to the STM-4 optical port output.

SDH/ATM Service Applications with Shared Bandwidth

The vP-Ring and VC-Ring shared ring realizes bandwidth sharing and statistical multiplexing for SDH/ATM services. SDH and ATM services on each network element share the same VC (VC-3, VC-4, or VC-4-Xv) channel, and the services are processed at the SDH/" target="_blank">ATM layer in each network element.

The indicators on the panel of ADL4 single board are: single board hardware status light (STAT), a red and green bi-color indicator; service activation status light (ACT), a green indicator; single board software status light (PROG), a red and green bi-color indicator as well as service warning indicator (SRV), a red, green and yellow indicator.

OSN3500 device ADL4 single board provides a standard STM-4 optical interface, which can be interfaced with switch or DSLAM to complete the transmission of SDH/ATM services. Meanwhile, bandwidth pooling and bandwidth multiplexing are accomplished through signal header switching processing to avoid bandwidth waste.