RFC 1659 (rfc1659) - Page 2 of 21
Definitions of Managed Objects for RS-232-like Hardware Devices using SMIv2
Alternative Format: Original Text Document
RFC 1659 RS-232-like MIB July 1994
o RFC 1445 [3] which defines the administrative and other
architectural aspects of the framework.
o RFC 1448 [4] which defines the protocol used for network
access to managed objects.
The Framework permits new objects to be defined for the purpose of
experimentation and evaluation.
2.1. Object Definitions
Managed objects are accessed via a virtual information store, termed
the Management Information Base or MIB. Objects in the MIB are
defined using the subset of Abstract Syntax Notation One (ASN.1)
defined in the SMI. In particular, each object object type is named
by an OBJECT IDENTIFIER, an administratively assigned name. The
object type together with an object instance serves to uniquely
identify a specific instantiation of the object. For human
convenience, we often use a textual string, termed the descriptor, to
refer to the object type.
3. Overview
The RS-232-like Hardware Device MIB applies to interface ports that
might logically support the Interface MIB, a Transmission MIB, or the
Character MIB. The most common example is an RS-232 port with modem
signals.
The RS-232-like Hardware Device MIB is mandatory for all systems that
have such a hardware port supporting services managed through some
other MIB.
The MIB includes multiple similar types of hardware, and as a result
contains objects not applicable to all of those types. The
compliance definitions herein thus have a general group for all
implementations, and separate groups for the different types of
ports, such as asynchronous and synchronous.
The RS-232-like Hardware Port MIB includes RS-232, RS-422, RS-423,
V.35, and other asynchronous or synchronous, serial physical links
with a similar set of control signals.
The MIB contains objects that relate to physical layer connections.
Such connections may provide interesting hardware signals (other than
for basic data transfer), such as RNG and DCD. Hardware ports also
have such attributes as speed and bits per character.
Stewart