Huawei BBU3900, BBU5900 and baseband boards

Huawei board names describe function rather than sequence. `UBBP` is universal baseband processing, `WBBP` is the earlier WCDMA-specific baseband, `UMPT` is universal main processing and transmission — the control and transport board — and `LMPT` is its LTE-only predecessor. The trailing letter and digit indicate generation and variant, so UBBPe6 and UBBPg1 are different capabilities within the same family, and UMPTa2 and UMPTb1 are successive generations. The `03` eight-digit code is the ordering reference; the `WD2D...` string is Huawei's internal configuration code and is the most precise identifier when a model name is ambiguous.

Specify the board family and the exact generation letter, because capacity differs substantially between variants within one family. Confirm which BBU chassis the board will go into and, critically, your software release — Huawei enforces board and release dependencies, and a newer board in an older release will not commission. Also confirm how many cells and carriers the board must serve, since that determines whether the variant you have identified is adequate. If you are expanding rather than replacing, tell us what is already fitted in the chassis and how many slots remain.

WBBP boards and the BBU3900 chassis are end-of-sale, available as new surplus or refurbished. UBBP boards and the BBU5900 remain in wider circulation. Export-control screening applies as it does to all Huawei items; we confirm per transaction.