Overview
The 4E1 PDH Optical Multiplexer with 4FE is a highly integrated, reliable, and compact point-to-point optical transmission device. It provides 1 to 4 E1 interfaces, 4 10/100M Fast Ethernet switch interfaces supporting VLAN, and 2 expansion interfaces that can be flexibly utilized as transmission channels for asynchronous data such as RS232, RS485, or RS422. Engineered with comprehensive alarm functions, low power consumption, and high integration, it delivers stable and efficient performance for telecom and enterprise private networks.
Features
- Proprietary ASIC Design: Designed based on self-developed intellectual property integrated circuits.
- Optical Detection: Features modular wide dynamic range optical detectors.
- Wire-Speed Ethernet: Supports 10/100M interface rate with half/full duplex auto-negotiation (Wire Speed 100M).
- E1 Standard Compliance: E1 interface complies with ITU-T G.703, adopting digital clock recovery and smooth phase-lock technology.
- Order-Wire Hotline (Optional): Supports a standard 2-wire telephone set (non-telephone handles) as an engineering order-wire hotline.
- Flexible Data Expansion: Equipped with 2 expansion interfaces acting as transmission channels for RS232, RS485, or RS422 asynchronous data.
- Comprehensive Alarm Monitoring: Detects remote power loss or fiber disconnection upon optical signal loss and indicates alarms via LED.
- Remote Status Visibility: Allows the local device to monitor the working condition of the remote device.
- Remote Loopback Diagnostics: Supports remote E1 interface loopback commands for easy line maintenance.
- Long-Distance Transmission: Supports relay-free transmission distances up to 2–120 km without interruption.
- Flexible Power Options: Optional AC 220V, DC -48V, or DC +24V power supply inputs.
- Polarity Protection: DC -48V / DC +24V power supply features automatic polarity detection (Polarity-Free).
Parameters
◆ Optical Interface
| Optical Ports | 1 Port |
| Multi-Mode Fiber | • Fiber Core: 50/125µm, 62.5/125µm • Max Distance: 5km @ 62.5/125µm (Attenuation: 3dBm/km) • Wavelength: 820nm • Transmitting Power: -12dBm (Min) ~ -9dBm (Max) • Receiver Sensitivity: -28dBm (Min) • Link Budget: 16dBm |
| Single-Mode Fiber | • Fiber Core: 8/125µm, 9/125µm • Max Distance: 40km @ 9/125µm (Attenuation: 0.35dBm/km) [2–120km optional] • Wavelength: 1310nm • Transmitting Power: -9dBm (Min) ~ -8dBm (Max) • Receiver Sensitivity: -27dBm (Min) • Link Budget: 18dBm |
◆ E1 Interface
| Interface Standard | Complies with ITU-T G.703 |
| Interface Rate | n × 64 Kbps ± 50 ppm |
| Line Code | HDB3 |
| E1 Impedance | 75 Ω (unbalanced), 120 Ω (balanced) |
| Jitter Tolerance | Complies with ITU-T G.742 and G.823 |
| Allowed Attenuation | 0 ~ 6 dBm |
◆ Ethernet Interface (10/100M)
| Interface Rate | 10/100 Mbps, half/full duplex auto-negotiation |
| Interface Standard | Compatible with IEEE 802.3, IEEE 802.1Q (VLAN) |
| MAC Address Capability | 4096 MAC Addresses |
| Connector | RJ45, supports Auto-MDIX |
◆ Working Environment
| Working Temperature | -10°C ~ 50°C |
| Working Humidity | 5% ~ 95% (non-condensing) |
| Storage Temperature | -40°C ~ 80°C |
| Storage Humidity | 5% ~ 95% (non-condensing) |
Specifications
| Model Number | KDSP-E4F4 |
| Functional Description | 4E1 + 4FE PDH Optical Multiplexer with Order-Wire Phone (19-inch 1U, Standard Telephone Interface) |
| Port Description | • 1 Optical Port • 4 E1 Interfaces (75 Ω / 120 Ω) • 4 Fast Ethernet (FE) Interfaces • 1 Console Interface • 2 Expansion Interfaces • 1 Engineering Order-Wire Telephone Interface |
| Power | Power Supply: AC 180V ~ 260V / DC -48V / DC +24V Power Consumption: ≤ 10 W |
| Dimensions | 19-inch 1U, 483 × 138 × 44 mm (W × D × H) |
| Weight | 2.3 kg |
Application
