QSP28 100GBase ER4 Module White Paper
![QSP28-100GBase-ER4-Module-White-Paper](https://www.skylaneoptics.com/app/uploads/2021/03/QSP28-100GBase-ER4-Module-White-Paper-690x0-c-default.jpg)
Overview:
Q28QD040C05D is a high performance QSFP28 transceiver module for 100 Gigabit Ethernet data links over a single mode fibre pair. The maximum reach is 40km. The four transmitters are cooled 1310nm LAN-WDM lasers generating four optical 25Gbps output signals, which are multiplexed together at the optical output port. The four receivers are PIN photodiodes which detect (after optical de-multiplexing) 4× 25Gbps optical input signals. This transceiver module is compliant with the QSFP28 Multisource Agreement (MSA) and hot pluggable.
![Figure 1: QSFP28 ER4 Diagram](https://www.skylaneoptics.com/app/uploads/2021/03/Figure-1-QSFP28-ER4-Diagram.png)
Features
- QSFP28 Multi-Source Agreement compliant
- Hot pluggable QSFP28 footprint
- Supports 103.125 Gbps Data Rate
- Dual LC Connector
- 4´ 25.781Gbps Serial Electrical Interface (CEI-28G-VSR)
- 4´ cooled 1310nm LAN-WDM Transmitters
- 4´ PIN+SOA Receivers
- Up to 40km Point-to-Point Transmission on Single Mode Fibre
- Operating temperature range 0°C to 70°C
- Power Dissipation < 5W
- Single +3.3V Power Supply
Applications
- Data Centre Interconnect (DCI)
- Metro P2P
- Enterprise(Links between buildings, Connections between Enterprise and Metro Access locations)
Key characteristics
- Power consumption of 5.5W average at 70 C
- Power consumption of 4.5W average at 35 C
- Supports 40km without FEC
Compatibility:
- Arista Networks
- Cisco
- Coriant
- Dell
- ECI
- Extreme
- Huawei
- Juniper
- Transmode – Infinera
- Generic
Benefits
- No physical risk when overloading the Receiver
- Compatible with all the major brands
Limitations
- high power consumption due to the SOA (Semiconductor Optical Amplifier)
- QSFP28 port has to support 5.5W max @ 70 C on case
Compatibility matrix:
![Note 1: FEC must be used irrespective of distance / Note 2: Operation w/o FEC is possible for distances up to 30km. 40km operation only possible w/ FEC operation](https://www.skylaneoptics.com/app/uploads/2021/03/Capture-d’écran-2021-03-15-à-15.09.58.png)
Website:
https://www.skylaneoptics.com/en/product/q28qd040c05d-qsfp28-100gbase-er4/
Datasheet: https://www.skylaneoptics.com/app/uploads/2019/10/Q28QD040C05D_RevA.pdf
Want to know more about the QSFP28 ER4 variants?
Read our white paper on the QSFP28 ER4 Lite!