Nortel Networks BCM1000 Benutzerhandbuch
Chapter 4 Selecting the media bay modules for your system
63
Installation and Maintenance Guide
Changing the DS30 split
You can change the DS30 bus allocation to a 3/5 split to accommodate increased IP telephony or
VoIP trunk requirements. You do this by assigning DS30 07 to the voice data sector. This choice
should be made at system startup, but a default system can be changed through the Unified
Manager to a 3/5 split after startup if IP requirements increase. At startup, you indicate the split
you want when you run the Quick Start Wizard. Refer to the Programming Operations Guide for
details.
VoIP trunk requirements. You do this by assigning DS30 07 to the voice data sector. This choice
should be made at system startup, but a default system can be changed through the Unified
Manager to a 3/5 split after startup if IP requirements increase. At startup, you indicate the split
you want when you run the Quick Start Wizard. Refer to the Programming Operations Guide for
details.
shows a model of how the DS30 bus blocks are a subgroup of the DS256 bus on the
MSC. The diagram also shows offsets, which are a subgroup of the DS30 blocks.
Figure 25 DS30 bus model
DS30 bus numbers are set using the number 4, 5, and 6 DIP switches on the back or underside of
the media bay modules. The exception is the FEM module. The FEM DIP switches turn on ports,
each of which consumes one DS30 bus.
the media bay modules. The exception is the FEM module. The FEM DIP switches turn on ports,
each of which consumes one DS30 bus.
Explaining Double Density
BCM 3.0 software introduced the concept of single and double density for DS30 buses supporting
station modules. On these buses the B2 bus blocks are reconfigured as B1 bus blocks, thereby,
doubling telephone capacity. However, only DSM16+, DSM32+ and ASM/GASM8 modules can
support the second set of DNs. The DSM16+ and DSM32+ modules can be configured for either
single density, which access only the top 16 DNs, or double density, which accesses all 32 DNs.
station modules. On these buses the B2 bus blocks are reconfigured as B1 bus blocks, thereby,
doubling telephone capacity. However, only DSM16+, DSM32+ and ASM/GASM8 modules can
support the second set of DNs. The DSM16+ and DSM32+ modules can be configured for either
single density, which access only the top 16 DNs, or double density, which accesses all 32 DNs.
Warning:
If you change the DS30 split from 3/5 to 2/6 after your system is configured,
you will lose all the data and optional application connections.
DS256
on MSC
on MSC
DS30 bus 02
DS30 bus 03
DS30 bus 04
DS30 bus 05
DS30 bus 06
DS30 bus 07
DS30 blocks
available to modules
in a 2/6 split
available to modules
in a 2/6 split
Four offsets per bus
DS30 blocks
available to modules
in a 3/5 split
available to modules
in a 3/5 split