Operations Manual

OPERATIONS 4-31
O&M of the MCC-545B PACKET DATA RADIO
12/2000
idle probes from each one it receives and then selecting the one it hears the most during a
specific period of time.
The MCC-545B and the MCC-545 OEM Transceiver both have this capability. The MCC-
550B/C DAU does not, but it can operate with up to four Masters at a time. It will transmit data
reports and text messages to any Master in its ID list. The MCC-550B/C ID command is entered
as shown below:
ID,NNNN,M1,M2,M3,M4
where NNNN is the Remote ID and M1 - M4 are the usable Masters
The MCC-545 OEM Transceiver always operates in this mode. The UR command allows up to
four Master Station IDs where the first Master on the list is the preferred Master. Single-
segment data reports are sent to any of the defined Masters but text messages, no-text check-ins
and longer data reports are sent only to the preferred Master. A fixed 30-minute period is used to
count idle probes and select the preferred Master.
The MCC-545 OEM Transceiver ID command is entered as:
UR,NNNN,M1,M2,M3,M4
Where NNNN is the Remote ID,
M1 - M4 are the usable Masters with
M1 being the current preferred Master
The MCC-545B is set up using the ID and SNP commands. It will only operate with its
preferred Master. Data reports will not be transmitted to other Masters. It will choose its
preferred Master at the interval given in the SNP,NDOWN command from among all Masters it
receives.
The commands used are:
ID,NNNN,MM, PREF, INIT
where NNNN is the Remote ID,
MM is the initial preferred Master ID,
PREF enables the preferred mode of Master selection.
SNP,NUP,N
where N is the minimum number of idle probes per minute to qualify as a Master
SNP,NDOWN,D
Where D is the period in minutes to count idle probes and choose a preferred Master