800G DCO Transponder Card – APX-DCO-800G-T4
Product Overview
The Apex APX-DCO-800G-T4 is a single-slot transponder card that maps four 400G client interfaces onto two 800G coherent line interfaces. It carries two independent wavelength conversion units, each able to operate at 800G, for high-capacity transport inside a transport platform chassis.
The client side offers four pluggable QSFP-DD112 ports at 400G, while the line side uses two pluggable 800G OSFP DCO coherent colored modules. Traffic is mapped through 400GE to ODUC4, ODUC8 and OTUC8, with G.709 ODUk (k = C4, C8) path monitoring and OTUk section monitoring.
DWDM operation follows ITU-T G.694.1 with 16QAM line modulation at 800G and soft-decision FEC. The line wavelength is tunable on a 100GHz grid across 40 channels in the extended C-band, and built-in diagnostics include PRBS testing, Ethernet bidirectional interruption and automatic laser shutdown.
Key Features
- Four 400G QSFP-DD112 client ports
- Two 800G OSFP DCO coherent line ports
- Two independent wavelength conversion units, each rated at 800G
- 400GE mapped to ODUC4, ODUC8 and OTUC8
- G.709 ODUk (k = C4, C8) path monitoring and OTUk section monitoring
- DWDM tuned per ITU-T G.694.1 on a 100GHz grid
- 800G 16QAM line modulation with soft-decision FEC
- Tunable 40-channel extended C-band operation
- PRBS testing, Ethernet bidirectional interruption and automatic laser shutdown
- Single-slot card that shares the host platform management
Technical Specifications
| Specification | Detail |
|---|
| Part Number | APX-DCO-800G-T4 |
| Brand | Apex |
| Card Type | Single-slot DCO transponder |
| Client Interfaces | 4 x QSFP-DD112 400G |
| Line Interfaces | 2 x 800G OSFP DCO coherent, colored |
| Wavelength Conversion Units | 2 independent, each up to 800G |
| Client Mapping | 400GE to ODUC4 to ODUC8 to OTUC8 |
| OTN Monitoring | G.709 ODUk (k = C4, C8) PM, OTUk SM |
| DWDM Grid | ITU-T G.694.1, 100GHz spacing |
| Line Modulation | 800G 16QAM |
| FEC | Soft-decision FEC (SD-FEC) |
| Wavelength Tunability | Tunable, 40 channels, 100GHz, extended C-band |
| Diagnostics | PRBS, Ethernet bidirectional interruption, automatic laser shutdown |
| Host Platform | Fits the OTN and DCI transport platforms |
Available Configurations
APX-DCO-800G-T4 Two-Unit Mode
Both wavelength conversion units operate at 800G for maximum line capacity, each driving its own 800G OSFP DCO coherent line port for two independent wavelengths.
APX-DCO-800G-T4 Client Flexibility
The four 400G QSFP-DD112 client ports are distributed across the two conversion units, so an operator can populate client interfaces as service demand grows.
Applications
Core and Long-Haul Transport
Two 800G wavelengths per card add high-capacity capacity to core and long-haul routes on existing fiber.
Data Center Interconnect
The card links data centers over regional distances, mapping 400GE clients onto 800G coherent wavelengths.
High-Capacity Metro Rings
Metro rings gain dense 400G and 800G transport with tunable extended C-band wavelengths for flexible wavelength planning.
Capacity Expansion on Existing Fiber
Tunable 40-channel operation lets operators light new 800G wavelengths on the same fiber span without changing the optical layer.
Compatibility
Interoperable with major optical transport and networking platforms. The line side follows ITU-T G.694.1 and G.709, the client side uses standard QSFP-DD MSA pluggables, and the card is managed through the host transport platform.
Frequently Asked Questions
How many client and line interfaces does the card provide?
It offers four 400G QSFP-DD112 client interfaces and two 800G OSFP DCO coherent line interfaces, all pluggable.
Can the two conversion units operate independently?
Yes. Each of the two wavelength conversion units can run at 800G and drive its own line wavelength independently.
How is the line wavelength tuned?
The line wavelength is tunable on a 100GHz grid across 40 channels in the extended C-band, following ITU-T G.694.1.
What diagnostics are built in?
PRBS testing, Ethernet bidirectional interruption and automatic laser shutdown are available, along with G.709 ODUk and OTUk monitoring.
Why Choose Apex
- Two independent 800G wavelength conversion units in a single slot
- Four 400G QSFP-DD112 client ports for dense service aggregation
- Tunable 40-channel extended C-band line with 16QAM and SD-FEC
- Built-in diagnostics including PRBS, ALS and bidirectional interruption
