o alternate speed
Default: 0
Alternate (low) speed (in bits per second) to operate the
line. You can modify this characteristic only when the entity
is disabled. This characteristic is supported only when the
characteristic communications mode is asynchronous, the
characteristic modem control is full, the characteristic modem
options includes rateselect, the characteristic clock is internal,
and when the alternate line speed is needed.
o call accept timer
Default: 0
Minimum time (in milliseconds) between the assertion of data set
ready and accepting a call by asserting request to send. This
characteristic is not supported if the characteristic modem
control is none.
o carrier loss timer
Default: 15000
Maximum time (in milliseconds) that the carrier detect signal
can be absent before the loss of carrier event is generated.
This characteristic is not supported if the characteristic modem
control is none.
o clock
Source of the transmit and receive clocks.
external The modem provides the clock.
internal The communications device provides the clock.
reflected The DTE transmit clock is a reflection of the
DCE transmit clock. This minimizes the clock to
data skew that the DCE encounters when high line
speeds are used.
The default value depends on the setting of the characteristic
communications mode. If communications mode is asynchronous, the
default value of this characteristic is internal. Otherwise, the
default value is external.
The value of this attribute has no effect when the communications
line is in loopback mode. In this case, the type of loopback
determines the type of clock. You can modify this characteristic
only when the entity is disabled.
o communications mode
Default: Sychronous Value: Asynchronous or synchronous
Communications method to be used on the link, either asynchronous
or synchronous. The value of this characteristic is a copy of the
communications mode argument specified when the entity is created.
You cannot modify this characteristic.
o communications port
Default: None
Name of the communications port. The value of this characteristic
is a copy of the communications port argument specified when the
entity is created. You cannot modify this characteristic.
o connection type (Tru64 UNIX)
Default: Nonswitched Value: Nonswitched or switched
Indicates whether the line is switched or non-switched. The value
of this characteristic is a copy of the connection type argument
specified when the entity is created. You cannot modify this
characteristic.
o duplex
Default: Full Value: Full or half
Indicates whether the line is full- or half-duplex. The value of
this characteristic is a copy of the duplex argument specified
when the entity is created. You cannot modify this characteristic.
o encoding
Default: normal Value: normal or nrzi
Encoding technique used on the line. You can modify this
characteristic only when the entity is disabled.
o initial hold timer (Tru64 UNIX)
Default: 10
Maximum time, in seconds, that the entity waits for an incoming
call to be accepted.
o maximum call setup timer (Tru64 UNIX)
Default: 60
Maximum time, in seconds, that the entity waits for an outgoing
call to connect.
o maximum disable transmit timer
Default: 500 Value: 0-60000
Maximum time, in milliseconds, that clear to send can remain
asserted before the line is disconnected after Request to Send
is deasserted. This attribute is not supported if the
characteristic modem control is set to none.
o maximum dsr deassertion timer
Default: 5000 Value: 0-60000
Maximum time, in milliseconds, the entity will wait for data set
ready to be deasserted after it has deasserted data terminal
ready. If this timer expires, the entity assumes it can assert
data terminal ready once again. This attribute is not
supported if the characteristic modem control is set to none.
o maximum enable transmit timer
Default: 2000 Value: 1-5000
Maximum time, in milliseconds, between the assertion of the
request to send signal and receiving the assertion of the clear
to send signal. This attribute is not supported if the
characteristic modem control is set to none.
o minimum dtr deassertion timer
Default: 1000 Value: 0-60000
Minimum timer, in milliseconds, that the DTE will deassert data
terminal ready during a disconnection. This attribute is not
supported if the characteristic modem control is set to none.
o modem control
Default: Full Value: Full or none
Indicates whether the interchange circuits are to be monitored and
used. The value none means that only the data leads are monitored.
The value full must be used when the value of the characteristic
duplex is half. This characteristic is supported only if
the characteristic connection type is switched.
o modem options
Default: No options Value: Set of options
Set of values that determine the capabilities of the modem.
dialout The modem can dial the remote modem. Supported
only if the value of communications type is
switched. This value is supported by Tru64 UNIX
only.
direct The modem is directly connected to the remote
modem through a non-switched line. Supported
only if accompanied withdialout and used only
when the modem protocol type supports direct
dial. This value is supported by Tru64 UNIX
only.
rate select The modem is capable of data rate selection.
o modem protocol format (Tru64 UNIX)
Default: See following Value: See following description.
description.
Format to use for V.25bis protocol messages. This characteristic
applies only when the characteristic modem protocol type is
v25bis or dmcl.
asynchronous Use the asynchronous format.
hdlc Use the HDLC format.
synchronous Use the synchronous format.
The default value depends on the value of the characteristic
communications mode. If communications mode is asynchronous, the
default value of this characteristic is also asynchronous. If the
value of communications mode is synchronous, the default value of
this characteristic is hdlc.
o modem protocol type (Tru64 UNIX)
Default: V25bis Value: See description
Protocol that the modem uses to select modem options and to set
line control parameters.
at A set of automatic calling procedures used in the
Hayes Smart Modem 2400.
dmcl The Digital Modem Control Language, based on
V.25bis.
v25 A set of automatic calling and answering
procedures defined by CCITT. These procedures
use the 200-series circuits defined in the
CCITT recommendation V.24. The V.235 procedures
are also known as parallel automatic calling
procedures.
v25bis A set of automatic calling and answering
procedures defined by CCITT. These procedures
use the 100-series circuits defined in the CCITT
recommendation V.24. The V.25bis procedures
are also known as serial automatic calling
procedures.
o profile
Default: None
Name of the local profile to be used with the line. This profile
is used to restrict the range of various line attributes, and to
change the defaults for those attributes. The value of
this characteristic is a copy of the profile argument specified
when the entity is created.
o rate select
Default: High Value: High or Low
Specifies which of the line rates is to be used if none is
specified when a call is set up.
high The value of the speed characteristic is used.
low The value of the alternate speed characteristic
is used.
o speed
Default: 0
High speed, in bits per second, to be used on the line. This value
is always used on asynchronous links. It is used on synchronous
links only in the following circumstances:
o When the value of the clock characteristic is internal
o When a null modem cable is detected
o When using a loopback mode that uses internal clocking
o successful call indication timer
Default: 30
Maximum time, in seconds, that the entity will wait for indication
of a successful call before disconnecting the line. This
attribute is not supported if the characteristic modem
control is set to none.
o suppress test indicator
Default: False Value: True or false
Specifies whether the Test Mode signal is to be monitored. If the
value is false, a change in the circuit will be monitored and will
cause the Test Indication event to be generated.
You should set this characteristic to true in cases where the
transitions of this signal are not produced by entering test
mode, so that this signal should be ignored.
o transmit holdoff timer
Default: 0
Necessary delay, in milliseconds, between the transmitter
being disabled and then reenabled. The value 0 means
that the request to send signal can be asserted as soon as the
client requests it. This characteristic is not supported if the
characteristic modem control is set to none.