Overview
The 8E1 PDH Optical Multiplexer with 4FE is a highly integrated, reliable, and compact point-to-point optical transmission device housed in a standard 19-inch 1U rack-mount enclosure. It provides 1 to 8 E1 interfaces, 4 10/100M Fast Ethernet switch interfaces with VLAN support, 1 Console port for local management, and 2 expansion interfaces designed as transmission channels for asynchronous data such as RS232, RS485, or RS422. Built with self-developed integrated circuit technology, it features low power consumption, comprehensive alarm functions, and stable, robust performance for telecom and enterprise private networks.
Features
- Proprietary ASIC Technology: Engineered with self-developed integrated circuit (IC) technology for high reliability and low power consumption.
- Advanced Optical Detection: Features modular wide dynamic range optical detectors for stable long-distance transmission.
- Wire-Speed Ethernet & VLAN: Equipped with 4 Fast Ethernet switch ports supporting 10/100M half/full-duplex auto-negotiation and VLAN functions (100M wire-speed).
- E1 Compliance & PLL Recovery: E1 interface complies strictly with ITU-T G.703, featuring digital clock recovery and smooth phase-locked loop (PLL) technology.
- Engineering Order-Wire (Optional): Supports a standard 2-wire telephone set (non-telephone handles) as an engineering order-wire hotline for field operations.
- Flexible Data Expansion: Includes 2 expansion interfaces acting as transmission channels for RS232, RS485, or RS422 asynchronous data.
- Optical Link Loss Indication: Detects remote power loss or optical fiber disconnection upon optical loss and provides real-time LED alarm notifications.
- Remote Monitoring: Enables local devices to monitor real-time operating conditions of remote units.
- Remote Loopback Maintenance: Supports remote interface loopback commands for convenient line diagnostics and network maintenance.
- Long-Distance Transmission: Supports relay-free optical transmission distances from 2 km to 120 km.
- Flexible Power Selection: Optional AC 220V, DC -48V, or DC +24V power supply inputs.
- Polarity-Free DC Power Input: DC -48V / DC +24V inputs feature automatic polarity detection for safe, polarity-free installation.
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-E8F4 |
| Functional Description | 8E1 + 4FE PDH Optical Multiplexer with Order-Wire Phone & Console Port (19-inch 1U Rack-mount) |
| Port Description | • 1 Optical Port • 8 E1 Interfaces (75 Ω / 120 Ω) • 4 Fast Ethernet (FE) Interfaces • 1 Console Interface • 2 Expansion Interfaces (RS232/RS485/RS422) • 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 × 45 mm (W × D × H) |
| Weight | 2.5 kg |
Application
