According to China Telecom Sunshine Procurement Network, on October 12, China Telecom released the pre-qualification notice for its 2026 Centralized Procurement Project for Provincial 400G DWDM/OTN Equipment (New Build).
Approved and sponsored by China Telecom Corporation Limited, this group-level procurement is self-funded and now open for pre-qualification applications from eligible bidders.
This procurement targets provincial network gear rather than national backbone infrastructure, with a limited scale. The tender covers 400G DWDM/OTN equipment, including an estimated 146 × 400 Gb/s line-side ports, together with corresponding client-side ports and common units. All quantities are provisional estimates. The project also sets out key technical performance requirements for the supplied hardware.
(1) 400G DWDM/OTN Equipment
| No. | Technical Item | Specific Requirements |
|---|---|---|
| 1 | Equipment dimensions | The equipment must meet the installation requirements of 300 mm or 600 mm deep cabinets and 19/21-inch racks. |
| 2 | Power supply | The equipment must support -48 V DC and HVDC (high-voltage direct current) power supply. |
| 3 | Line rate and modulation format | Vendor equipment shall support the following rates and modulation formats: (1) Boards carrying 400 Gbit/s signals at 150 GHz channel spacing shall use PM-QPSK modulation; (2) Boards carrying 400 Gbit/s signals at 100 GHz channel spacing shall use PM-PCS-16QAM modulation. |
| 4 | Wavelength band | The equipment shall support the extended C-band (190.725 THz – 196.675 THz). |
| 5 | Performance | (1) Single-unit performance: OSNR tolerance per channel; (2) System performance: post-transmission OSNR margin, pre-FEC BER, and optical path OSNR penalty. For specific values, refer to the CCSA industry standards “Technical Requirements for N×400 Gbit/s Ultra-Long-Haul Wavelength Division Multiplexing (WDM) Systems” and “Technical Requirements for N×400 Gbit/s Wavelength Division Multiplexing (WDM) Systems”. |
| 6 | Service protection and switching | (1) Equipment supporting electrical cross-connect shall support SNCP protection with a protection switching time of 50 ms or less; (2) ROADM equipment shall be capable of enabling the WSON automatic restoration function based on “centralized computation + distributed control”. |
| 7 | Cross-connect requirements | (1) Equipment with electrical cross-connect capability shall support ODUflex and ODU4 cross-connect granularities; (2) ROADM equipment shall support wavelength-independent and direction-independent add/drop capability, flexible scheduling of wavelength granularities between different directions, and flexible grid. |
| 8 | Network management | Complete network management capability, with support for the T2 interface. |