MIB Descriptions
B-28
9161-A2-GH30-20
September 1997
Synchronous Port Table
The Synchronous Port Table contains an entry for each of the synchronous data
ports and the COM port when the port is configured for synchronous operation.
For this unit, entries in the table that are counters (rs232SyncPortEntry 3–7) are
used to collect statistics only and are not supported. Clarification for objects
contained in this table as it applies to the unit is provided below.
Object
Description
Setting/Contents
rs232SyncPort
ClockSource
(rs232Sync
PortEntry 2 )
Specifies the clock source
for the port.
Supports only the following values:
internal(1) – The port uses an
internal clock.
external(2) – The port uses an
external clock.
rs232SyncPort
Role
(rs232Sync
PortEntry 8 )
Specifies whether this
device interface is a DTE or
DCE.
Supports only the following value:
dce(2) – The port acts as a DCE.
rs232SyncPort
Encoding
(rs232Sync
PortEntry 9 )
Specifies the bit encoding
technique that this port
uses.
Supports only the following values:
nrz(1) – The port uses non-return to
zero encoding.
nrzi(2) – The port uses non-return to
zero inverted encoding. Corresponds
to when the transmit and received
data are inverted.
rs232SyncPort
RTSControl
(rs232Sync
PortEntry 10 )
Specifies the method used
to control the RTS signal.
For synchronous data
ports, this corresponds to
Send All Ones on Data Port
Not Ready configuration
option, except that Both
and DTR cannot be
represented.
Supports only the following values:
controlled(1) – For user data ports,
this value is used when the port is
configured for RTS or Both. Setting
this value is equivalent to configuring
the port for RTS.
constant(2) – For user data ports,
this value is used when the port is
configured for DTR or None. Setting
this value is equivalent to configuring
the port to None. This is the only valid
value for the COM port.
rs232SyncPort
RTSCTSDelay
(rs232Sync
PortEntry 11 )
Specifies the interval (in
milliseconds) that the DTE
must wait after RTS is
asserted before it can
assert CTS.
Supports only the following value:
0 – The port does not have to wait.
rs232SyncPort
Mode
(rs232Sync
PortEntry 12 )
Specifies the port’s mode of
operation with respect to
the direction and
simultaneousness of the
data transfer.
Supports only the following value:
fdx – The port is full duplex.
rs232SyncPort
MinFlags
(rs232Sync
PortEntry 14 )
Specifies the minimum
number of flag patterns the
port needs to recognize the
end of one frame and the
start of another.
Supports only the following value:
2 – The minimum number of flags
supported for all ports on the unit.
