An OSI transport template entity provides a collection of characteristics that supply default values for certain parameters that influence the operation of a port on a transport connection. One template, with the reserved identifier default, is automatically created when the osi transport entity is created. This template is used by default when a user does not specify a template identifier in a call to establish a connection. The default template is automatically deleted when the osi transport entity is deleted. Similarly, the initial values of the attributes in a template are the same as the current values in the default template.
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ACKNOWLEDGMENT DELAY TIME
Default: 1 Value: 0-65
Maximum amount of time, in seconds, that an AK TPDU is to be withheld.
This attribute is valid for protocol class 4 only.
CHECKSUMS
Default: False Value: Boolean
Specifies whether the use of checksums should be negotiated for a
transport connection. This attribute is valid for protocol class 4
only.
CONS TEMPLATE
Default: OSI Transport Value: Simple-name
Name of the X.25 Access module template to be used when establishing a
network connection over the CONS. Used only when the value of the
network service attribute is cons.
CR TIMEOUT
Default: 30 Value: 1 - ( 2 to the 23rd)
During connection establishment, the amount of time, in seconds, to
wait for a response to a CR TPDU before assuming that the remote
transport service provider will not respond. This attribute is valid
for protocol classes 0 and 2 only.
ER TIMEOUT
Default: 30 Value: 1 - ( 2 to the 23rd)
The amount of time, in seconds, to wait for a response to an ER TPDU
before disconnecting the network connection. This attribute is used
for protocol classes 0 and 2 only.
EXPEDITED DATA
Default: True Value: Boolean
Specifies whether use of the expedited data option should be negotiated
for the transport connections. This attribute is not valid for
protocol class 0.
EXTENDED FORMAT
Default: None Value: Boolean
Specifies whether the use of extended TPDU format should be negotiated
for the transport connections. Normal format gives 7-bit sequence
numbers and 4-bit credit fields; extended format gives 31-bit sequence
numbers and 16-bit credit fields. This attribute is supported only for
class 2 and class 4 protocols.
INBOUND
Default: True Value: Boolean
Indicates whether this template may be used as the template for an
inbound transport connection. The algorithm of selection of the inbound
template is different depending on the type of network service over
which the transport connection is made. If an inbound template cannot
be found for an inbound transport connection, then the template called
default will be selected as the default. For the CLNS network
service, the inbound template selected is the first template found that
has the Inbound attribute set to true, the Network Service attribute
set to CLNS, and the CLNS Inactive Area Address attribute set to empty
set.
For the CLNS network service using the inactive subset, that is, null
internet, the incoming template selected is the first template found
that has the Inbound attribute set to True, the Network Service
attribute set to CLNS and the CLNS Inactive Area Address attribute
matches the Inactive Area Address attribute of the Routing Circuit
entity that the transport connection is using. For the CONS network
service, the inbound template selected is the first template found that
has the inbound attribute set to true, the network service attribute
set to CONS and the CONS template attribute that is, an X.25 Access
template name matches the name of the X.25 Access filter that was used
to accept the inbound network connection.
INITIAL RETRANSMIT TIME
Default: 5 Value: 1 - ( 2 to the 23rd )
Amount of time, in seconds, to wait for an acknowledgment before
retransmitting the first TPDU over the transport connection.
KEEPALIVE TIME
Default: 60 Value: 1 - 6383
Time, in seconds, to be used for the window timer. When the transport
service provider has no TPDUs to send over a transport connection, it
retransmits the last AK TPDU at the specified frequency to prevent
expiration of the remote NSAP's inactivity timer. This attribute is
valid for protocol class 4 only.
LOCAL NSAP
Default: system dependent Value: NSAP address
A local NSAP address to be used by default if one is not supplied
across the service interface.
MAXIMUM NSDU SIZE
Default: 2048 Value: 2048
When operating over the CONS, the maximum NSDU size to use for transmit
and receive buffers. Expressed as a number of octets.
NETWORK SERVICE
Default: CLNS Value: any, CLNS, or CONS
Type of network service. The network service chosen must be compatible
with the value of the protocol class attribute.
ANY - Either.
CLNS - Connectionless Network Service.
CONS - Connection-Oriented Network Service.
RETRANSMIT THRESHOLD
Default: 8 Value: 0 - ( 2 to the 23rd )
Number of times a TPDU requiring acknowledgment is to be retransmitted
before it is assumed that network connectivity has failed. This
attribute is valid for protocol class 4 only.
SECURITY
Default: Null Value Value: Octet String
An octet string to be transmitted in the security parameter of a CR or
CC TPDU. A null value causes the security parameter to be omitted from
the TPDU. For security reasons, this attribute cannot be displayed.
SEND IMPLEMENTATION ID
Default: True Value: Boolean
Indicates whether the implementation id should be sent in the CR if the
proposed protocol class is 2 or 4. It is always returned in the CC if
it is present in the CR.
SEND PREFERRED MAXIMUM TPDU SIZE
Default: True Value: Boolean
Indicates whether the preferred maximum TPDU size parameter should
be sent in the CR TPDU.
If the preferred maximum TPDU size parameter was present in the CR
TPDU, then it indicates whether the preferred maximum TPDU size
parameter should be sent in the CC TPDU.
The default value of this characteristic should not be changed unless
the remote implementation does not conform to ISO 8073.
SEND REQUEST ACKNOWLEDGMENT
Default: True Value: Boolean
Indicates whether the request acknowledgment parameter should be sent
in the CR TPDU.
If the request acknowledgment parameter was present in the CR TPDU, then
it indicates whether the request acknowledgment parameter should be
sent in the CC TPDU.
The default of this characteristic should not be changed unless the
remote implementation does not conform to ISO 8073.
USE CLNS ERROR REPORTS
Default: False Value: Boolean
Indicates whether the network Routing layer's error report facility
should be used when performing connection establishment. If set to
true, this may result in faster detection of an unreachable node at
the time of connection establishment. This characteristic should not
be set to true on an end system that is either dual-railed or
connected to a network that has a high probability of duplication.
This is valid only if network service equals CLNS.