Chapter 7 Setting media bay module DIP switches 101
Installation and Maintenance Guide
ASM 8/GASM8 switch settings
For systems running software prior to BCM 3.0, only two ASM units can share a DS30 bus, using
offset 0, 1 or 2. BCM 3.0 software introduced the concept of double density, which allows you to
install an ASM8/GASM8 on all four offsets on DS30 02 to 05. DS30 06 and 07 remain in single
density mode for the default Partial Double Density (PDD) system. This means that only two
ASM8/GASM8 modules would be supported on these DS30 blocks unless the system is changed
to Full Double Density (FDD). GASM8 modules can also support firmware download on systems
running BCM 3.6 and newer software. Refer to “GASM8 country switch settings” on page 103.
DN numbering sequence: A DS30 bus set to double density has a total of 32 lines available for
telephones. On systems upgraded from BCM 2.5/2.5.1, the first 16 lines on the bus do not number
consecutively with the second 16 lines on the bus. On systems that were new for BCM 3.0, the 32
lines on the bus do number consecutively.
Table 20 shows the switch settings for each DS30 bus and the dialing numbers (DNs) assigned to
each DS30 bus. The table shows settings for a system in FDD. For PDD systems, where DS30 06
and 07 are single density, only two modules can be installed on either bus.
Table 20 ASM8 settings for upgraded 2.5 systems and new 3.0 systems
Select
bus#
Select
offset
Enter these switch
settings To assign these DNs 2 Custom DN
range
1234562.5 system
upgraded to 3.0
New 3.0 system
02
0on on on on on on 221-228 221-228
1on on on on on 228-236 228-236
off
2on on on on on 377-384 237-244
off
3on on on on 385-392 245-252
off off
03
0on on on on on 237-244 253-260
off
1on on on on 245-252 261-268
off off
2on on on on 393-400 269-275
off off
3on on on 401-408 276-284
off off off
04
0on on on on on 253-260 285-292
off
1on on on on 261-268 293-300
off off
2on on on on 409-416 301-308
off off
3on on on 417-424 309-316
off off off