PDH Optical Terminal PT-50B Service Boards
*PWR board: -48V DC or 220V AC is optional, supports dual power supply.
PDH Optical Terminal PT-50B Audio Service Boards:
*Audio interface card: Two-wire interface are FXS, FXO, H (hotline), M (magneto), and two-wire E&M; four-wire interface is 4 wire E&M. The nominal impedance is 600Ω
*Maintenance phone port: Maintenance phone has echo tone, busy tone, and ring signal.
Up-link Boards:
Optical transmission units: 2, mutual backup, hot swap, transmission distance is more than 30KM without repeat.
PDH Optical Terminal PT-50B Data Service Boards:
*E1 interface card: 4 E1s per card, 75Ω or 120Ω can be selected. Q9 with75Ω and RJ45 with 120Ω.
*RS485 data card: contains 2 channels asynchronous RS485 data interfaces, they are full duplex and four wire mode interfaces.
*RS232 data card: contains 2 channels asynchronous RS232 data interface, conforms to ITU-T V.24/V.28 standard.
*N×64Kbps FV.35 card: contains 1~4 channel synchronous V.35 data of N×64Kbps data rate, N is from 1 to 30.
*10/100M Ethernet data interface card: providing 4 channel 10/100 Base-T Ethernet bridge, support VLAN.
PDH Optical Terminal PT-50B Remark:
Power board and uplink board are essential, other audio and data service board is optional. PT-50B may be configured as 4 or 8 E1s, 4 ports of 10/100M Ethernet, 4 or 8 channels of voice signal, 2 channels of RS232 asynchronous data, 1 to 4 channels of V.35 synchronous data, 2 net management ports, and 1 maintenance phone port.