We offer all HUAWEI OptiX 1500B board series, below are some for your reference:

03052498 SSRDCXLL1611 STM-16 master cross-connect optical interface board (I-16, LC)
03052499 SSRDCXLL1612 STM-16 Master Controlled Crossing Interface Board (S-16.1, LC)
03052500 SSRDCXLL1613 STM-16 master cross-connect optical interface board (L-16.1, LC)

Optical Interface Board (L-4.1, LC) 2xSTM-4 Optical Interface Board (L-4.1, LC) SSN1SLD4A
Optical Interface Board (L-4.2, LC) 2xSTM-4 Optical Interface Board (L-4.2, LC) SSN1SLD4A
STM-4 optical interface board (S-4.1, LC) SSN1SL4A (S-4.1, LC)

SSN1EFT8 16 port 10M / 100M Ethernet transparent transmission processing board
03030EAF SSN1EFT8A 8-port 10M / 100M Ethernet transparent transmission processing board
03039006 SSR1EFT4 4-port 10M / 100M Ethernet transparent transmission processing board

(1000BASE-SX, 850-LC) 4-port Gigabit Ethernet / Fast Ethernet processing board with switching capability (1000BASE-SX, 850-LC)
(1000BASE-LX, 1310-LC) 4-Port Gigabit Ethernet / Fast Ethernet Processing Board with Switched Interface (1000BASE-LX, 1310-LC)
(1000BASE-VX, 1310-LC) 4-Port Gigabit Ethernet / Fast Ethernet Processing Board with Switching Function (SSBE)

03026740 SSN1EU08 8xSTM-1 Electrical interface lead-out board
03026741 SSN1OU08 (S-1.1, LC) 8xSTM-1 Optical port outlet board (LC, S-1.1)
03026951 SSN1MU04 4xE4 & STM-1 Electrical connection lead-out board

OSN 1500 is a new-generation optical transmission system developed by Huawei. It adopts a unified switching architecture and can function as an MPLS-based packet device or a TDM device. When working with other devices of Huawei, OSN 1500 supports various networking modes, including the pure packet mode, hybrid networking (packet + TDM) mode, and pure TDM mode, achieving optimal processing for packet services and traditional SDH services. Thus, OSN 1500 efficiently transmits voice, data, storage, and video services over the same platform.