6.1 – Characteristics
o 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.
o checksums
Default: False Value: True or false
Specifies whether the use of checksums should be negotiated for a
transport connection. This attribute is valid for protocol class
4 only.
o classes
Default: {4} Value: Bit-set
Set of protocol classes that can be negotiated for use on a
transport connection. If the value of the network service
attribute is CLNS, the class must be a subset of the classes
supported by the OSI transport attribute clns classes supported.
If the value is CONS, the classes must be a subset of the
classes supported by the OSI transport attribute cons classes
supported. If the value of the network service attribute is ANY,
the classes must be a subset of the combined classes in the clns
classes supported and cons classes supported attributes.
o clns inactive area address (OpenVMS)
Default: Empty set Value: Set of area-address
Specifies the inactive area address to be used by transport
connections that use this template. This characteristic is
relevant only for connections that use CLNS with Null Internet.
The set must contain no more than one area address.
o cons template
Default: OSI Value: Simple-name
Transport
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.
o cr timeout
Default: 30 Value for Tru64 UNIX: 1-(2 raised to the
power of 31 -1)
Default: 30 Value for OpenVMS: 1-4294967295
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.
o er timeout
Default: 30 Value for Tru64 UNIX: 1-(2 raised to the
power of 31 -1)
Default: 30 Value for OpenVMS: 1-4294967295
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.
o expedited data
Default: True Value: True or false
Specifies whether use of the expedited data option should be
negotiated for the transport connections. This attribute is not
valid for protocol class 0.
o extended format
Default: None Value: True or false
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.
o inbound (OpenVMS)
Default: True Value: True or false
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.
o initial retransmit time
Default: 5 Value for Tru64 UNIX: 1-(2 raised to the
power of 31 -1)
Default: 5 Value for OpenVMS: 1-4294967295
Amount of time (in seconds) to wait for an acknowledgment before
retransmitting the first TPDU over the transport connection.
o keepalive time
Default: 60 Value: 1-16383
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.
o local nsap
Default: System Value: NSAP address
dependent, determined
at run-time
A local NSAP address to be used by default if one is not supplied
across the service interface.
o loopback (OpenVMS)
Default: False Value: True or false
Specifies whether transport connections using this template are
looped back locally in the transport layer.
o maximum nsdu size
Default: 2048 Value for Tru64 UNIX: 128-4294967295
Default: 2048 Value for OpenVMS: 2048
When operating over the CONS, the maximum NSDU size to use for
transmit and receive buffers. Expressed as a number of octets.
o network priority (OpenVMS)
Default: 0 Value: 0-255
When operating over CLNS, indicates network priority encoded in
NPDU header for all transmitted packets. It may be used by
intermediate systems to assign the packets to queues of
appropriate priority.
o network service
Default: clns Value: Any, clns, cons, or RFC1006
(OpenVMS)
Type of network service. On Tru64 UNIX, the default template
network service cannot be set to any. 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
RFC1006 ISO Transport Service on top of TCP
o retransmit threshold
Default: 8 Value: 0-4294967295
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.
o RFC1006 port number (OpenVMS)
Default: 102 Value: TCP port number
Specifies the TCP port number to use. Only applicable if the
network service is RFC1006.
o 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.
o send implementation id
Default: None Value: True or false
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.
o send preferred maximum TPDU size
Default: True Value: True or false
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.
NOTE
The default value of this characteristic should not be changed
unless the remote implementation does not conform to ISO 8073.
o send request acknowledgment
Default: True Value: True or false
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.
NOTE
The default of this characteristic should not be changed unless the
remote implementation does not conform to ISO 8073.
o use clns error reports
Default: False Value: True or false
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.
6.2 – Identifier
o name
Simple name assigned to the template when it is created. The name
default is reserved.