TAILIEUCHUNG - Debug isdn q921 Field Descriptions

Indicates the identity request message type sent from the local router to the network (assignment source point (ASP)) during the automatic TEI assignment procedure; this message is sent in a user interface (UI) command frame; the SAPI value for this message type is always 63 (indicating that it is a Layer 2 management procedure) but it is not displayed; the TEI value for this message type is 127 (indicating that it is a broadcast operation) | debug isdn q921 Field Descriptions Field Description Jan 3 14 49 Indicates the date and time at which the frame was transmitted from or received by the data link layer entity on the router the time is maintained by an internal clock TX Indicates that this frame is being transmitted from the ISDN interface on the local router user side RX Indicates that this frame is being received by the ISDN interface on the local router from the peer network side IDREQ Indicates the identity request message type sent from the local router to the network assignment source point ASP during the automatic TEI assignment procedure this message is sent in a user interface III command frame the SAPI value for this message type is always 63 indicating that it is a Layer 2 management procedure but it is not displayed the TEI value for this message type is 127 indicating that it is a broadcast operation ri 31815 Indicates the reference number used to differentiate between user devices requesting TEI assignment this value is a randomly generated number between 0 and 65535 the same ri value sent in the IDREQ message should be returned in the corresponding IDASSN message note that a reference number of 0 indicates that the message is sent from the network-side management layer entity and a reference number has not been generated ai 127 Indicates the Action indicator used to request that the ASP assign any TEI value it is always 127 for the broadcast TEI note that in some message types such as identity remove IDREM a specific TEI value is indicated IDREM Indicates the IDREM message type sent from the ASP to the user-side layer management entity during the TEI removal procedure this message is sent in a III command frame the message includes a reference number that is always 0 because it is not responding to a request from the local router the ASP sends the IDREM message twice to avoid message loss IDASSN Indicates the identity assigned message type sent from the ISDN service provider on

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