o active base
Default: 255 Value: 0-255
Specifies the 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.
o active increment
Default: 0 Value: 0-255
Specifies the 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.
o 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.
o babble timer
Default: 6000 Value: 1-65535
Specifies the 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.
o buffer source
Default: Implementation-specific Value: See description
Specifies the source of the receive buffers.
client Buffers are provided by the client entity.
supplied
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.
o dead threshold
Default: 8 Value: 0-255
Specifies the 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.
o dying base
Default: 0 Value: 0-255
Specifies the 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.
o dying increment
Default: 16 Value: 0-255
Specifies the 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.
o dying threshold
Default: 2 Value: 0-255
Specifies the 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.
o 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.
o 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.
o inactive increment
Default: 64 Value: 0-255
Specifies the 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.
o inactive threshold
Default: 8 Value: 0-255
Specifies the 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.
o maximum buffers
Default: 4 Value: Implementation specific
Specifies the 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.
o maximum transmit
Default: 4 Value: 1-255
Specifies the 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.
o polling state
Default: Automatic Value: See description.
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.
o transmit timer
Default: 0 Value: 0-65535
Specifies the 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.
o transmit window
Default: 1 Value: 1-255
Specifies the 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.