4E1 desk-top PDH fiber multiplexer
Short Description:
| optical fiber | |
| port No. | 1 |
| fiber type | single fiber/dual fiber |
| port type | FC/SC/ST/LC |
| wavelength | 850nm/1310nm multimode; 1310nm/1550nm single mdoe |
| transmission distance without relay | 20~120km |
| typical transmitting power | SM 1310/1550nm：≥-9dBmMM 850nm：-18dBmMM 1310nm: -25dBm |
| range of receiving sensitivity | -28dBm~- 40dBm |
| E1 interface | |
| interface protocol | ITU-T G.703 |
| rate | 2048Kb/s±50ppm |
| code type | HDB3 |
| impedance | 75Ω/120Ω |
| Jitter character | comply with ITU-T G.742、G.82 |
| input port allowed attenuation | 0～6dBm |
| FXS business telephone port | |
| ring voltage | 75V |
| ring frequency | 25Hz |
| 2 wire input impedance | 600Ω（pick up) |
| return loss | 20dB |
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