为什么 surt1000xli APC UPS 被 NUT apcsmart 驱动程序识别为“旧”？

Question

所以我用 RS232/USB 电缆将此 UPS 连接到机器。

ups.conf包含

[apc1]
    driver = apcsmart
    port = /dev/ttyUSB0
    desc = "APC USB"

我得到以下输出：

$ sudo upsdrvctl start
Network UPS Tools - UPS driver controller 2.7.1
Network UPS Tools - APC Smart protocol driver 3.1 (2.7.1)
APC command table version 3.1
very old or unknown APC model, support will be limited