 physical characteristics that are used with that UIUC which includes a list of physical layer attributes, encoded as TLV values. An Uplink_Burst_Profile is included for each UIUC to be used in the UL-MAP. Contention-Based Reservation Always Number of UL-MAPs to receive before contention-based Timeout reservation is attempted again for the same connection. Frequency Always UL center frequency (kHz). HO_Ranging_Start Always Initial backoff window size for MS performing initial ranging during handover process, expressed as a power of 2. HO_Ranging_End Always Final back-off window size for MS performing initial ranging during handover process, expressed as a power of 2. Available UL Radio Resources Always Indicates the average ratio of non-assigned UL radio resources to the total usable UL radio resources. The average ratio is calculated over a time interval defined by the UL_RADIO_RESOURCES WINDOW_SIZE parameter. The reported average ratio will serve as a relative load indicator. This value can be adjusted by the operator provided it reflects a consistent representation of the average loading condition of BSs across the operator network. Initial Ranging Codes Always Number of initial ranging CDMA codes. Possible values are from 0 to 255. The total number of codes is less than 256. Periodic Ranging Codes Always Number of periodic ranging CDMA codes. Possible values are from 0 to 255. The total number of codes is less than 256. Bandwidth Request Codes Always Number of bandwidth request codes. Possible values are from 0 to 255. The total number of codes is less than 256. Periodic Ranging Back-off Start Always Initial back-off window size for periodic ranging contention, expressed as a power of 2. Periodic Ranging Back-off End Always Final back-off window size for periodic ranging contention, expressed as a power of 2. (Continued) Table 9-13 Content of a UCD MAC Management Message [1] Continued Information Field in UCD Message Usage Description Start of Ranging Codes Group Always Indicates the starting number of the gr