o call association Name of the x25 access filter entity that matched an incoming call, or the name of the x25 access template entity used in making an outgoing call. This attribute is supported only if the status attribute port type is set to switched and the status attribute state is not set to open. o call direction Direction of the call on an SVC. incoming The call is an incoming call. outgoing The call is an outgoing call. This attribute is supported only if the status attribute port type is set to switched and the status attribute state is not set to open. o calling address extension Calling NSAP address that is carried transparently in an incoming or outgoing call packet. This attribute is supported only if the status attribute port type is set to switched and the status attribute state is not set to open. o calling dte address Calling DTE address in a call request or incoming call packet (depending on the value of the status attribute call direction). This attribute is supported only if the status attribute port type is set to switched and the status attribute state is not set to open. o channel Channel number of the underlying virtual circuit. This status is valid only if the port is at a gateway system and the status attribute state is not open. o client Name of the entity that opened the port. o dte class Name of the DTE class to which the DTE of the underlying virtual circuit belongs. This attribute is supported only if the status attribute state is not set to Open. o fast select Specifies whether fast select is in operation for the call. fast select Fast select in operation. no fast select Fast select not in operation. not specified Facility not requested. with response Fast select with response in operation. This attribute is supported only if the status attribute port type is set to switched and the status attribute state is not set to open. o group Name of the x25 protocol group entity (that is, CUG) associated with an incoming or outgoing call. This attribute is supported only if the status attribute port type is set to switched and the status attribute state is not set to open. o incoming packet size Packet size, in octets, for incoming data on a virtual circuit. This attribute is supported only if the status attribute state is not set to open. o incoming throughput class Throughput class for incoming data on a virtual circuit. o incoming window size Window size for incoming data on a virtual circuit. o local dte Name of the DTE entity associated with the call. o originally called address If a call is redirected, this is the DTE address from which the call was redirected; otherwise, the address is null. This status is valid only if the status attribute redirect reason is not [not] redirected. This attribute is supported only if the status attribute port type is set to switched and the status attribute state is not set to open. o outgoing packet size Packet size, in octets, for outgoing data on a virtual circuit. This attribute is supported only if the status attribute state is not set to Open. o outgoing throughput class Throughput class for outgoing data on a virtual circuit. o outgoing window size Window size for outgoing data on a virtual circuit. This attribute is supported only if the status attribute state is not set to open. o protocol identifier First four octets of call data in the call. This attribute is supported only if the status attribute port type is set to switched and the status attribute state is not set to open. o pvc Name of the pvc to which this port belongs. This attribute is present only if the status attribute port type is set to permanent. o redirect reason Specifies whether a call has been redirected and, if so, the reason for the redirection. busy The call has been redirected because the original destination was busy. not redirected The call has not been redirected. out of order The call has been redirected because the original destination was not operational. systematic The call has been redirected because all calls to the original destination have been systematically redirected. This attribute is supported only if the status attribute port type is set to switched and the status attribute state is not set to open. o remote port Port at the source (that is, accessing) node (when the client is an X.25 server). o reserved If the port is associated with a reserved Logical Channel Number (LCN), this specifies the name of the local DTE entity on which the LCN is reserved. A null string indicates that the port is not associated with a reserved LCN. This attribute is supported only if the status attribute port type is set to switched and the status attribute state is not set to open. o reverse charging Specifies whether reverse charging is in operation for the call. This attribute is supported only if the status attribute port type is set to switched and the status attribute state is not set to open. o state Status of the x25 access port entity. called A call has been received and taken by a user. calling A user is making a call. cleared A Clear Indication or Clear Confirmation packet has been received, or the X.25 Protocol module has detected an error. cleared by The port was cleared by network management. directive clearing A user has requested that the call should be cleared. no communi- Communications with the PSDN have been lost. cation open The port is open. running The associated virtual circuit is available for data transfer. synchronizing A user has requested a reset, but the network has not yet responded with a Reset Confirmation or Reset Indication packet. unsynchronized A Reset Indication packet has been received, or the X.25 Protocol module has detected an error and the user has not yet responded with a reset request. o target address extension Called NSAP address that is transparently carried in an incoming or outgoing call packet. This attribute is supported only if the status attribute port type is set to switched and the status attribute state is not set to open. o target dte address Called DTE address in a call request or incoming call. This attribute is supported only if the status attribute port type is set to switched and the status attribute state is not set to open. o type Specifies that the port represents an SVC. switched The circuit is an SVC. permanent The circuit is a PVC.