Driver support for Actelis ML638 VDSL Modem

NetBrain does not currently include a driver for Actelis ML638 VDSL Modem devices, which prevents discovery and benchmarking of this device type. This enhancement would add a discovery and benchmark driver for the Actelis ML638, enabling NetBrain to collect device configuration and topology data consistent with other supported device types. Customers operating Actelis ML638 modems within their network would benefit from complete topology visibility and reduced manual mapping effort.