1.PDH Electrical Interface
| Interface Type | 1544 kbit/s |
2048 kbit/s |
34368 kbit/s |
44736 kbit/s |
139264 kbit/s |
155520 kbit/s |
| Code | B8ZS, AMI | HDB3 | HDB3 | B3ZS | CMI | CMI |
| Signal bit rate at the output interface |
ITU-T G.703-compliant | |||||
| Attenuation tolerance at the input interface |
ITU-T G.823-compliant | |||||
| Frequency deviation tolerance at the input interface |
ITU-T G.703-compliant | |||||
| Anti-interference capability of input interface |
ITU-T G.824- compliant |
ITU-T G.823 -compliant |
ITU-T G.824- compliant |
ITU-T G.823- compliant |
ITU-T G.825- compliant |
|
2. DDN Interface
| Interface Type | Description | Standard |
| Framed E1 interface type |
Framed E1 signal | Physical and electrical features comply with ITU-T G.703. The frame structure complies with ITU-T G.704. |
| N x 64 kbit/s interface |
V.35 interface | Complies with ITU-T V.35. |
| V.24 interface | Complies with ITU-T V.24. | |
| X.21 interface | Complies with ITU-T X.21. | |
| RS-449 interface | Complies with EIA RS-449 (RS-423A, RS-422A). |
|
| RS-530 interface | Complies with EIA RS-530. | |
| RS-530A interface | Complies with EIA RS-530A. |
3. Auxiliary Interface
The OptiX OSN 3500 provides many auxiliary interfaces.
Table 1 Specifications of the 64 kbit/s interface
| Item | Specification |
| Bit rate | 64 kbit/s |
| Timing signal | From RX |
| Coding style | ITU-T G.703 |
| Outgoing pulse shape | ITU-T G.703 |
| Output interface characteristic | ITU-T G.703 |
| Incoming interface characteristic | ITU-T G.703 |
Table 2 Specifications of the RS-232 interfaces ，The RS-232 interfaces are S1, S2, S3 and S4 interfaces on the AUX.
| Item | Specification |
| Bit rate | 19.2 kbit/s to the maximum |
| Mode | RS-232 Tx & Rx data only |
| Electrical level | ±5 V to ±15 V |
Table 3 Specifications of the RS-422 interfaces，The RS-422 interfaces are S1, S2, S3 and S4 interfaces on the AUX.
| Item | Specification |
| Bit rate | 19.2 kbit/s to the maximum |
| Mode | RS-422 Tx & Rx data only |
| Electrical level | ±2.0 V |
Table 4 Specifications of the orderwire phone interface
| Item | Specification |
| Speech channel interface | |
| Impedance | 600 ohms |
| Bandwidth | 300 Hz to 3400 Hz |
| Operating current | 18 mA |
| Input gain | -4/0/0 dB |
| Output gain | 0/-7/0 dB |
| Signaling | DTMF compliant with ITU-T Q.23 |
| Analog EOW extension | |
| Impedance | 600 ohms |
| Bandwidth | 300 Hz to 3400 Hz |
| Tx level | -3.5±1 dBr |
| Rx level | -3.5±1 dBr |
HUAWEI Optix OSN 3500 Electrical Interfaces as below:
03039203 SSN2SPQ4 4xE4 & STM-1 electrical interface board
03050938 SSN2EMR0(1000BASE-SX,850-LC) 12-way 10M / 100M electrical port and 1 Gigabit optical port Ethernet ring processing board（1000BASE-SX,850-LC）
03050939 SSN2EMR0(1000BASE-LX,1310-LC) 12-way 10M / 100M electrical port and 1 Gigabit optical port Ethernet ring processing board(1000BASE-LX,1310-LC)
03050940 SSN2EMR0(1000BASE-ZX,1310-LC) 12-way 10M / 100M electrical port and 1 Gigabit optical port Ethernet ring processing board（1000BASE-ZX,1310-LC）
03050941 SSN2EMR0(1000BASE-ZX,1550-LC) 12-way 10M / 100M electrical port and 1 Gigabit optical port Ethernet ring processing board（1000BASE-ZX,1550-LC）
03027509 SSN1EU04 4xSTM-1 Electrical Interface Board
03026740 SSN1EU08 8xSTM-1 Electrical Interface Card
03026951 SSN1MU04 4xE4 & STM-1 Electrical Interface Board
03026734 SSN1D34S 6 Road 34M / 45M electrical interface conversion switch board
03027581 SSN1C34S 3xE3 / T3 electrical interface changeover board
03026727 SSN1D75S 32xE1 / T1 Electrical Interface Switch Outlet (75 Ohms)
03026728 SSN1D12S 32xE1 / T1 Electrical Interface Switch Outlet (120 ohm)
03027083 SSN1D12B 32xE1 / T1 electrical outlet board
03026756 SSN1TSB8 8-channel electrical interface protection switching board
03027527 SSN1TSB4 4-way electrical interface protection switching board
Hong Telecom Equipment Service Ltd provide all boards above.
Hong Telecom Equipment Service LTD 