name: UA
full_form: User Agent
context: GSM L2 protocol is adapted from LAPD (HDLC subset). The multiframe operation mode is established through exchange of supervisory frame SABM and unnumbered frame UA between peer entities, and SABM is always sent by UE/MS, UA is always sent by network. UE/MS will repeatedly transmit SABM till it receives UA or retransmission counter is reached. Some handover test cases require that the SS does not response to the incoming SABM, so handover fails. G_CL2_NoUAforSABM_REQ is used for such purpose, it commands the SS not to send UA response to the UE when SABM is received.
description: A User Agent (UA) message is an unnumbered frame sent by the network in response to a SABM (Set Asynchronous Balanced Mode) supervisory frame from the UE/MS. It indicates the establishment of multiframe operation mode.
explanation: The text describes UA as a type of signaling data exchanged between entities, specifically a frame sent in response to a supervisory frame. This aligns with the definition of a message in telecommunications.
section_title: 6.10.2.4.2No UA reply to SABM
biotag_Context: B-Network,B-Protocol,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Message,O,O,O,O,O,O,O,O,O,O,B-Message,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Message,O,O,O,O,O,O,O,O,O,O,O,O,B-Miscellaneous,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Miscellaneous,O,O,O,B-Message,O,O,O,B-Device,O,O,O,O
biotag_Description: O,B-Message,I-Message,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O