992 telnet protocol over TLS/SSL - System Port

992 is a System Port. Transport Protocol TCP UDP , 992 Service Name telnets, Service Name Description: telnet protocol over TLS/SSL.

Port	Protocol	Service Name	Description	Source
992	TCP UDP	telnets	telnet protocol over TLS/SSL	IANA
992	TCP UDP		TELNET protocol over TLS/SSL,Official	wikipedia
992	TCP UDP		Mac OS X RPC-based services, Used by NetInfo, for example	Apple.com
992			Snape	simovits.com
992	TCP UDP	telnets	telnet protocol over TLS/SSL	bekkoame

Port	Service Name	Description
100		Unassigned
1240	instantia	Instantia
1722	hks-lm	HKS License Manager
1918	can-nds	IBM Tivole Directory Service - NDS
2265	apx500api-2	Audio Precision Apx500 API Port 2
5344	xkotodrcp	xkoto DRCP
5394		Unassigned
7119		Unassigned
7942		Unassigned
8313	hub-open-net	Hub Open Network

A port is an endpoint of communication in an operating system. While the term is also used for hardware devices, in software it is a logical construct that identifies a specific process or a type of service.

Port numbers are assigned in various ways, based on three ranges: System Ports (0-1023), User Ports (1024-49151), and the Dynamic and/or Private Ports (49152-65535);

The Well Known Ports are assigned by the IANA and on most systems can only be used by system (or root) processes or by programs executed by privileged users. Ports are used in the TCP [RFC793] to name the ends of logical connections which carry long term conversations. For the purpose of providing services to unknown callers, a service contact port is defined. This list specifies the port used by the server process as its contact port. The contact port is sometimes called the "well-known port". To the extent possible, these same port assignments are used with the UDP [RFC768]. The range for well-known ports managed by the IANA is 0-1023.
DYNAMIC AND/OR PRIVATE PORTS Registered Ports are those from 1024 through 49151.
The Dynamic and/or Private Ports are those from 49152 through 65535