This read-only Integer32 (20000-59999), indexed by ifIndex, sub-interface index, and protocol type, reports the TCP port number automatically allocated for reaching a remote unit's management channel over Telnet or HTTP. Admins use this value when they need to connect directly to a specific remote unit's management interface through the parent access node, since each remote unit's channel is reachable on its own allocated port. For example, an admin reading zxAnRuChannelTcpPortNo as 25007 for a given remote unit's telnet(1) protocol type would use that port number to open a direct Telnet session to that specific remote unit through the access node.