[cisco-voip] two different layer 2 status indicators?

[Countryman, Edward]

Does anyone know what might cause the Layer 2 status output of the SHOW ISDN STATUS command to reflect two different TEI 's  ??
What does SAPI = 6 mean ??

    Layer 1 Status:
        ACTIVE
    Layer 2 Status:
        TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED
        TEI = 0, Ces = 1, SAPI = 6, State = TEI_ASSIGNED
    Layer 3 Status:
        0 Active Layer 3 Call(s)
    Active dsl 0 CCBs = 0
    The Free Channel Mask:  0x807FFFFF
    Number of L2 Discards = 0, L2 Session ID = 72
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