This read-write value controls whether the remote modem can be managed over the link, with enable(5) permitting remote management and disable(2) blocking it. Admins use it as a safety control since, once set to disable, the remote unit cannot be re-enabled for remote management from that side, meaning access must be restored from the local end. For example, an admin might set this object to disable(2) on a remote modem to prevent unauthorized configuration changes to that unit over the link, understanding that only the local unit can restore access afterward.