1 – line
set [node node-id] modem connect line line-name ...
Modifies the attributes for an modem connect line entity, which is
associated with a physical circuit on the node. The modifiable
attributes and their data types [in brackets] are:
alternate speed [bits-per-second]
call accept timer [milliseconds]
carrier loss timer [milliseconds]
clock [external, internal, or reflected]
encoding [normal or nrzi]
initial hold timer [seconds] (Tru64 UNIX)
maximum call setup timer [seconds]
maximum disable transmit timer [milliseconds]
maximum dsr deassertion timer [milliseconds]
maximum enable transmit timer [milliseconds]
minimum dtr deassertion timer [milliseconds]
modem control [full or none]
modem options [dialout, direct or rate select]
modem protocol format [type] (Tru64 UNIX)
modem protocol type [prot-type] (Tru64 UNIX)
rate select [high or low]
speed [bits-per-second]
successful call indication timer [seconds]
suppress test indicator [boolean]
transmit holdoff timer [milliseconds]
1.1 – 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.
1.2 – call_accept_timer
Default: 500
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.
1.3 – 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.
1.4 – 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.
1.5 – encoding
Default: normal Value: normal or nrzi
Encoding technique used on the line. You can modify this
characteristic only when the entity is disabled.
1.6 – initial_hold_timer
Default: 10 Value: 0-300
Maximum time, in seconds, within which the control service client
must accept an incoming call. This characteristic is supported
only when the characteristic connection type is switched.
1.7 – maximum_call_setup_timer
Default: 60 Value: 1-300
Maximum time, in seconds, that can pass before an outgoing call
is connected. This characteristic is supported only when the
characteristic connection type is switched.
1.8 – maximum_disable_transmit_timer
Default: 500
Maximum time, in milliseconds, that clear to send can remain
asserted before the line is disconnected after Request to Send
is deasserted. This characteristic is not supported if the
characteristic modem control is none.
1.9 – maximum_dsr_deassertion_timer
Default: 5000
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 characteristic is not
supported if the characteristic modem control is none.
1.10 – 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 characteristic is not supported if the
characteristic modem control is none.
1.11 – minimum_dtr_deassertion_timer
Default: 1000
Minimum timer, in milliseconds, that the DTE will deassert data
terminal ready during a disconnection. This characteristic is not
supported if the characteristic modem control is none.
1.12 – 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. You can modify this this characteristic only when
the entity is disabled. This characteristic is supported only if
the characteristic connection type is non-switched.
1.13 – modem_options
Default: No options Value: Set of options
Set of values that determine the capabilities of the modem. The
value dialout is supported only if the value of communications
type is switched. You can modify this characteristic only
when the entity is disabled.
dialout The modem can dial the remote modem.
direct The modem is directly connected to the remote
modem through a non-switched line.
rate select The modem is capable of data rate selection.
The value direct must be accompanied with dialout and used only
when the modem protocol type supports direct dial.
Format the values to specify one or any combination of modem
options.
1.14 – modem protocol format (Tru64 UNIX)
Format to use for V.25bis protocol messages. You can modify
this characteristic only when the entity is disabled. This
characteristic is supported only when the characteristic
connection type is non-switched. 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.
1.15 – modem protocol type (Tru64 UNIX)
Default: V25bis Value: See following description.
Protocol that the modem uses to select modem options and to set
line control parameters. You can modify this characteristic only
when the entity is disabled. This characteristic is supported only
when the characteristic connection type is non-switched.
at A set of automatic calling procedures used in the
Hayes Smartmodem 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.
1.16 – profile
Name of the local profile to be used with the line. The value of
this characteristic is a copy of the profile argument specified
when the entity is created. You cannot modify this characteristic.
1.17 – rate_select
Default: High Value: High or Low
Which of the line rates is to be used if none is specified when
a call is setup. high indicates that the value of the speed
characteristic be used, and low indicates that the value of the
alternate speed characteristic be used. This characteristic is
supported only if the characteristic modem control is full, and if
the characteristic modem options includes rateselect.
1.18 – 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
You can modify this characteristic only when the entity is
disabled.
1.19 – 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
characteristic is supported only when the characteristic modem
control is none.
1.20 – suppress_test_indicator
Default: False Value: True or false
Indicates whether the Test Mode signal is to be monitored. Use the
value false if the DCE deals with the Test Mode signal.
Setting this characteristic to true means that the interchange
circuit status attribute test mode will also be displayed as
Unknown.
1.21 – transmit_holdoff_timer
Default: 0
Necessary delay, in milliseconds, between the transmitter
being disabled and being enabled again. 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 none.