Because TFA never bothered to define it:

Broadband Network Gateway (BNG)[1]

[1]: https://github.com/codelaboratoryltd/bng#bng-broadband-netwo...

Thanks! "OLT" was also new to me. In case others find it helpful:

> OLT = Optical Line Terminal.

> In ISP fiber (typically GPON/EPON) infrastructure, it’s the provider-side device at the central office/headend that terminates and controls the passive optical network: it connects upstream into the ISP’s aggregation/core network and downstream via fiber (through splitters) to many customers’ ONTs/ONUs, handling PON line control, provisioning, QoS, and traffic aggregation.

Thanks.. was reading the article like WTF is "BNG"

Is it the FTTX equivalent of a BRAS?