The UBBPd6 supports hybrid configuration of 1R and 4R cells, or 2R and 4R cells. In hybrid
configuration, a maximum of six cells are supported
If two or more baseband boards in GSM mode are required, ensure that at least one of the baseband
board (UBBPd_G or UBRIb) is installed in slot 1, slot 2, or slot 3.
l In a GBTS, the UBBP_G installed in slot 4 cannot be connected to CPRI cables
The baseband processing board in UMTS mode configured only in slot 3 or 2 can be connected to
CPRI cables. The UBBP_U, WBBPd, or WBBPf is preferentially configured in slot 3 or 2. The
configuration priority of these types of boards is UBBP_U > WBBPf > WBBPd.
l If five or more baseband processing boards work in UMTS mode, ensure that a UBBP_U, WBBPd,
or WBBPf is configured in slot 3.
l If slots 2 and 3 are occupied by WBBPa or WBBPb boards, exchange boards to ensure that a
UBBP_U, WBBPd, or WBBPf is configured in slot 3 or 2. A UBBP_U, WBBPd, or WBBPf is
preferentially configured in slot 3.
l If two or more baseband boards in GSM mode are required, ensure that at least one of the baseband
board (UBBPd_G or UBRIb) is installed in slot 1, slot 2, or slot 3.
l In a GBTS, the UBBP_G installed in slot 4 cannot be connected to CPRI cables.
The baseband processing board in UMTS mode configured in only slot 3 can be connected to CPRI
cables. A UBBP_U, WBBPd, or WBBPf is preferentially configured in slot 3. The configuration priority
of these types of boards is UBBP_U > WBBPf > WBBPd.
l If five baseband processing boards work in UMTS mode, ensure that a UBBP_U, WBBPd, or WBBPf is
configured in slot 3.
l If slot 3 is occupied by a WBBPa or WBBPb, exchange boards to ensure that a UBBP_U, WBBPd, or
WBBPf is configured in slot 3.
l If two or more baseband boards in GSM mode are required, ensure that at least one of the baseband board
(UBBPd_G or UBRIb) is installed in slot 1, slot 2, or slot 3.
l In a GBTS, the UBBP_G installed in slot 4 cannot be connected to CPRI cables.
The following table describes the principles for BBU slot assignment in a triple-mode base
station.