Technical specification of VSM-155S  

• World leading design adopts independent ASICs , with 1U single-board structure ,compactness ,high reliability , low power consumption;

• Provides 63*63 VC12 non-blocking cross-connect , support tributaries Add/Drop of 1~16*E1 , with capability of unidirectional and bidirectional multiplexing :

• Support network of point , chain and ring , providing function like tributaries 1+1 channel protection ,etc.; .

• Can realize independent service –assignment or mutual protection between two optical interface , and can build (connected with VSM-155C) various complex networks of STM-1 multi-ring , and multi branch , etc.;

• Provides timing synchronous interface , implements switching of multiple timing source like 2Mb/s ,2MHZ ,STM-1 ,etc .,and output of 2Mb/s,2MHZ reference clock , supporting SSM function ;

• Provides multiple service interface of E1 , 10M Ethernet , RS232 ,etc.

• Provides Engineer order wire (EOW) interface (two –line model) , with group call and dial functions;

• Provides D1-D3 ECc channel , network management adopting TCP/IP communication protocol

• Provides F (Ethernet) and f (RS232) NMS interface , network management platform Easy SDHtm can realize ITU –T recommendation s five functions of resources , configuration , alarm , performance ,and security , etc.;

• Network management platform EasySDHtm can realize software remote downloading , with software live –upgrading capability ,being easy to maintain , can realize remote monitoring ;

• Through replacing optical devices , support ultra-long distance (<_80km) ,long distance (<_50km) and short distance (<_30km) optical transmission;

• Equipment adopts natural wind heat emission , with stable and reliable work.