Telserv Manual

Telserv Manual—427174-009
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1 The TELNET Server (Telserv)
For HP NonStop™ systems, the HP Telserv subsystem is the implementation of the
server portion of the TELNET protocol. The TELNET protocol is a general, bi-
directional, 8-bit, byte-oriented protocol in the TCP/IP protocol suite. It specifies how
terminal devices and terminal-oriented processes must interface.
Telserv runs on a NonStop system as an operating-system process and uses the
socket library routines of the TCP/IP software for TCP access. One Telserv process
supports up to 256 virtual terminals or “windows” through which a user’s data can be
sent and received after undergoing transformation to TELNET semantics.
As an HP product, Telserv consists of two components:

The TELNET server process (called the Telserv process)

The TELNET client process that runs on the NonStop system.
Other vendors offer terminal emulators containing client software that allows various
types of workstations to access Telserv. The Telserv subsystem can provide services
to:

HP TELNET clients hosted on NonStop systems

Clients included in terminal emulators that use the TELNET protocol to
communicate with host NonStop systems

Generic clients that support the TELNET protocol
The client features included in the HP TELNET client differ from the features other
vendors provide. While other vendors’ products might support the 6530 terminal type,
the HP TELNET client runs in NVT mode only.