| | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | |
| | POST PORT IMPEDANCE | | Unbalance about earth : | | DC Resistance < 50Ω | | | |
| | Zr:270Ω+（750Ω//150nF） | | 50-600Hz > 40.0dB | | | | | | | | |
| | | | | | 600-3400Hz > 46 dB | | | Isolation between Tip & Ring: | | |
| | | | | | 3400-4000Hz > 40 dB | | | > 25MΩ | | | | | |
| | Insertion Loss with Zr: | | 4000Hz-30KHz > 40.0dB | | | | | | | |
| | 1KHz < 1.0dB | | | 30KHz-140KHz > 45.0dB | | DC Current Range : | | | |
| | 200Hz-4KHz | | | 140KHz-12MHz > 30dB | | | 15mA-100mA | | | | |
| | < ±1.0dB relative 1KHz | | | | | | | | | | | |
| | 12K/16KHz metering pulses | | | | | | | | | | | |
| | with 200Ω :< 5.0dB | | Group Delay Distortion : | | PACKAGE： | | | | |
| | | | | | 200Hz-4000Hz < 200us | | Using carton for packing, each | | |
| | Return Loss with Zr : | | | | | | carton contains XXXpcs | | | |
| | 300Hz-3400Hz > 12.0dB | | Band Attenuation with ZRHF: | | size of carton :XXX*XXX*XXXmm | | | |
| | 3400Hz-4000Hz > 8.0dB | | 32KHz – 30MHz > 55.0dB | | Each box of net weight :XXKG | | | |
| | | | | | | | | | Each box of gross weight :XXKG | | |
| | | | | | | | | | | | | | | |
ISDN
