ACTIVE BASE
Default: 255 Value: 0-255
Base priority to which an active tributary is reset after it has been
polled. This characteristic is supported only if the characteristic
protocol of the owning ddcmp link entity is set to control.
ACTIVE INCREMENT
Default: 0 Value: 0-255
Value to be added to the active tributary priority each time the
scheduling timer expires. This characteristic is supported only if the
characteristic protocol of the owning ddcmp link entity is set to
control.
ADDRESS
Default: 1 Value: 1-255
Data link address of the remote station or tributary. You can modify
this characteristic only when the entity is disabled.
BABBLE TIMER
Default: 6000 Value: 1-65535
Time, in milliseconds, for which a selected tributary or remote station
is allowed to transmit. This characteristic is not used on full-duplex
links. This characteristic is not supported if the characteristic
protocol of the owning ddcmp link entity is set to tributary.
BUFFER SOURCE
Default: Implementation_specific Value: see below
Source of the receive buffers.
CLIENT SUPPLIED - Buffers are provided by the client entity.
COMMON POOL - Buffers are assigned from the common buffer pool.
This characteristic is supported only if the characteristic protocol
of the owning ddcmp link entity is set to control. You can modify
this characteristic only when the entity is disabled.
DEAD THRESHOLD
Default: 8 Value: 0-255
Number of times that an active, inactive, or dying tributary is polled
before its status attribute polling substate is changed to dead
because of receive timeouts. This characteristic is supported only if
the characteristic protocol of the owning ddcmp link entity is set
to control.
DYING BASE
Default: 0 Value: 0-255
Base priority to which a dying tributary is reset after being polled.
This characteristic is supported only if the characteristic protocol
of the owning ddcmp link entity is set to control.
DYING INCREMENT
Default: 16 Value: 0-255
Value to be added to a dying tributary's priority each time the
scheduling timer expires. This characteristic is supported only if
the characteristic protocol of the owning ddcmp link entity is set
to control.
DYING THRESHOLD
Default: 2 Value: 0-255
Number of times an active or inactive tributary is polled before its
status attribute polling substate is changed to dying because of
receive timeouts. This characteristic is supported only if the
characteristic protocol of the owning ddcmp link entity is set to
control.
HOLDBACK TIMER
Default: 0 Value: 0-13000
Maximum time, in milliseconds, that the local station can delay
acknowledging a received message if there is no data to send. The value
of this characteristic is linked to the retransmit timer used on the
remote station. A suggested value is between 10% and 20% of that timer.
However, the actual values you can use may be limited by the
communications product. The default value indicates that no holdback
is used and the local station must acknowledge immediately.
INACTIVE BASE
Default: 0 Value: 0-255
Specifies the priority to which an inactive tributary is reset after it
has been polled. This characteristic is supported only if the
characteristic protocol of the owning ddcmp link entity is set to
control.
INACTIVE INCREMENT
Default: 64 Value: 0-255
Value to be added to an inactive tributary's priority each time the
scheduling timer expires. This characteristic is supported only if the
characteristic protocol of the owning ddcmp link entity is set to
control.
INACTIVE THRESHOLD
Default: 8 Value: 0-255
Number of times an active tributary is polled before its status
attribute polling substate is changed to inactive because of no
data response. This characteristic is supported only if the
characteristic protocol of the owning ddcmp link entity is set to
control.
MAXIMUM BUFFERS
Default: 4 Value: Implementation specific
Maximum number of buffers that a tributary can use from the common
buffer pool. A value of 0 means that there is no limit to the number of
buffers that can be used. This characteristic is supported only if the
buffer source characteristic is set to common pool. This
characteristic is supported only if the characteristic protocol of
the owning ddcmp link entity is set to control. You can modify this
characteristic only when the entity is disabled. Also, you can only
increase the characteristic value.
MAXIMUM TRANSMIT
Default: 4 Value: 1-255
Maximum number of messages that a tributary or a remote half-duplex
station can send at one time. The value of this characteristic must be
greater than or equal to that of transmit window on the selected
station. This characteristic is not supported if either of the
following conditions is true:
o The characteristic protocol of the owning ddcmp link entity is
set to tributary.
o The communications link is full-duplex and point-to-point.
You cannot modify this characteristic.
POLLING STATE
Default: Automatic Value: see below
Specifies the effect of the local station's polling algorithm on the
state of a tributary. The value of this characteristic is reflected in
the value of the status attribute polling substate.
ACTIVE - The state is locked to active.
AUTOMATIC - The state varies according to the operation of the polling
algorithm.
DEAD - The state is locked to dead.
DYING - The state is locked to dying.
INACTIVE - The state is locked to inactive.
This characteristic is supported only if the characteristic protocol
of the owning DDCMP link entity is set to control.
TRANSMIT TIMER
Default: 0 Value: 0-65535
Time, in milliseconds, that the local station waits between data
transmissions. This characteristic is supported only if the
characteristic protocol of the owning ddcmp link entity is set
to control.
TRANSMIT WINDOW
Default: 1 Value: 1-255
Maximum number of data messages that the local station can send
without receiving an acknowledgment. This characteristic applies only
when the remote station is a control station or on a half-duplex,
point-to-point link. The value of this characteristic must be less
than or equal to the equivalent of the maximum transmit
characteristic on the control station or remote station.