Access Channel MAC Subtype

Last updated: November 3, 2008

This section is only applicable to the lab application and to a test application with the required feature license.

In Active Cell operating mode and IS-856 Test operating mode, the PL Subtype 2 Access Channel MAC Subtype allows you to select either the Default or the Enhanced Access Channel MAC protocol subtype when the Protocol Rel is set to release A (1xEV-DO-A) and the Release A Physical Layer Subtype is set to Subtype 2 , or the Protocol Rel is set to release B (1xEV-DO-B) and the Release B Physical Layer Subtype is set to Subtype 2 or Subtype 3 . In Active Cell operation mode what you set is negotiated with the AT during Session Negotiate State . When the test set is configured to subtype 0 physical layer, only the Default Access Channel MAC protocol is negotiated.

The Default (Subtype 0) indicates that the protocol subtype assigned to the Access Channel MAC protocol is Default Access Channel MAC and its Subtype ID number is 0x0000. The Enhanced (Subtype 1) indicates that the protocol subtype assigned to the Access Channel MAC protocol is Enhanced Access Channel MAC and its Subtype ID number is 0x0001.

As defined by the C.S0024 standard, when a session is not open, the test set is internally configured to the Default Access Channel MAC protocol. When a session is successfully open, the specified Access Channel MAC Subtype is configured for the session.

As shown in the table below, the current Access Channel MAC Subtype indicates the Access Channel MAC protocol that the test set is emulating. It is displayed on the Configurable Attribute In Use window on the Access Network Information screen or can be queried with CALL:STATus:PROTocol:ACMac? .

When the Physical Layer Subtype is set to Subtype 2 or Subtype 3, changing the Access Channel MAC Subtype results in a session re-negotiation once a session is open. If a connection is open, changing the Access Channel MAC Subtype results in the connection dropped with signaling. You will have to re-open the connection. For details, see Session Negotiate State .