Overview
The 4E1 PDH Optical Multiplexer with FE is a highly integrated, compact, and cost-effective point-to-point optical transmission device built on proprietary ASIC technology. It integrates 4 E1 transparent interfaces and 1 Fast Ethernet port (10/100M wire-speed), alongside an optional digital order-wire telephone channel. Engineered with comprehensive alarm monitoring, low power consumption, and robust circuit stability, it provides a reliable and flexible networking solution for telecom operators and enterprise private networks.
- High Integration & Small Form Factor: Standard 19-inch 1U rack-mount enclosure engineered with self-developed integrated circuits for space-saving deployment.
- Wire-Speed Ethernet & Protection: Delivers full 100M wire-speed Fast Ethernet transmission with built-in Ethernet loopback prevention during optical loop testing.
- Flexible Power & Reliable Operation: Supports AC/DC dual power supply inputs (AC 220V, DC -48V/24V) with dual-power redundancy options (AC+DC, AC+AC, DC+DC).
Features
Optical & Transmission Specifications
- Proprietary ASIC Design: Built on specialized integrated circuit technology with modular, wide dynamic range optical receiving modules.
- Flexible Distance Support: Supports relay-free long-distance optical transmission ranging from 2 km to 120 km.
- Optical Loss Indication: Detects remote power loss or fiber link disconnection upon optical loss, triggering real-time LED alarm indicators.
Interface & Service Capabilities
- 4 E1 Transparent Transmission: E1 interfaces strictly comply with ITU-T G.703, featuring full-digital clock recovery and smooth phase-locked loop (PLL) technology.
- Wire-Speed Fast Ethernet: Supports 10/100M full/half-duplex auto-negotiation and wire-speed 100M bandwidth delivery.
- Ethernet Loopback Protection: Integrated loopback prevention mechanism prevents network failure caused by accidental Ethernet loops during optical diagnostics.
- Order-Wire Telephone (Optional): Supports 1-channel PCM digital engineering order-wire telephone for field maintenance communication.
Diagnostics & Network Management
- Remote Status Monitoring: Real-time visibility and status display of remote end equipment directly from the local unit.
- Remote Line Loopback: Supports remote E1 interface loopback functionality for fast and convenient line troubleshooting.
Power & Installation Specifications
- Standard Enclosure: 19-inch 1U rack-mount chassis for easy installation in standard telecom cabinets.
- Flexible Power Backup Options: Supports AC 220V, DC -48V, or DC +24V input with 1+1 dual power supply redundancy options (AC+DC, AC+AC, DC+DC).
Parameters
◆ Optical Interface
| Optical Ports | 1 Port |
| Fiber Mode | Single-fiber / Dual-fiber (Single-mode / Multi-mode) |
| Connector | FC / SC / ST / LC (SFP optional) |
| Wavelength | Multi-mode: 850nm / 1310nm; Single-mode: 1310nm / 1550nm |
| Transmission Distance | 20 km to 120 km (relay-free) |
| Transmit Power | Single-mode 1310/1550nm: ≥ -9 dBm Multi-mode 850nm: -18 dBm Multi-mode 1310nm: -25 dBm |
| Receiver Sensitivity | -28 dBm to -40 dBm |
◆ E1 Interface
| Standard | ITU-T G.703 compliant |
| Bit Rate | 2048 Kbps ± 50 ppm |
| Line Code | HDB3 |
| Impedance | 75 Ω Unbalanced (BNC) / 120 Ω Balanced (RJ45) |
| Jitter Performance | Complies with ITU-T G.742 and G.823 |
| Allowed Attenuation | 0 ~ 6 dBm |
◆ Ethernet Interface (10/100M)
| Interface Rate | 10/100 Mbps adaptive, Half/Full Duplex Auto-Negotiation |
| Standard | Compatible with IEEE 802.3, IEEE 802.1Q (VLAN) |
| MAC Address | 4096 MAC Addresses |
| Connector | RJ45, Supports Auto-MDI/MDIX |
◆ Working Environment
| Working Temperature | -10°C ~ 60°C |
| Working Humidity | 5% ~ 95% (non-condensing) |
| Storage Temperature | -40°C ~ 80°C |
| Storage Humidity | 5% ~ 95% (non-condensing) |
Specifications
| Model Number | KDSP-E4F1 |
| Function Description | 4 E1 + 1 FE PDH Optical Multiplexer with Engineering Order-Wire Telephone |
| Port Description | • 1 Optical Port
• 4 E1 Interfaces (75 Ω / 120 Ω) • 1 Fast Ethernet Port (10/100M) • 1 Order-Wire Telephone Interface |
| Power | Power supply: AC 180V ~ 260V / DC -48V / DC +24V (Dual power backup optional)
Power consumption: ≤ 10 W |
| Dimensions | 19-inch 1U, 485 × 138 × 44 mm (W × D × H) |
| Weight | 2.3 kg |
Application
