126 Chapter 8 Installing a media bay module (MBM)N0060612N0060612GATM switch settingsThere are two models of GATM:GATM 4: The GATM 4 provides connections for four analog calling line identification (CLID) orsupervision disconnect PSTN lines. Each voice line uses one line in the DS30 bus offset. Becauseeach DS30 bus has four lines per offset, you can assign a maximum of four GATM4s to a singleDS30 bus by making the offset switch settings different for each MBM.GATM 8: The GATM 8 provides connections for eight analog calling line identification (CLID)or supervision disconnect PSTN lines. Each line uses one line in the DS30 bus offset. Becauseeach DS30 bus has four lines per offset, you require two offsets for each GATM 8. You can assigna maximum of two GATM 8s to a DS30 bus by making the offset switch settings different for eachMBM.You can also combine a GATM 8 with a 4x16 on the same DS30 number. When you choose anoffset number for the GATM 8, the system automatically adds the next offset number. You cannotassign offset 3 to the GATM 8 because this does not allow the MBM to assign the second set oflines.There are two sets of DIP switches located on the rear of the GATM:• The left set allows you to determine the DS30 bus and offset for the MBM.• The right set allows you to manually configure a country profile operation, which is requiredfor earlier versions of software.However, BCM 3.6 and newer software supports downloadable firmware for the North America,Taiwan, UK, and Australia telephony profiles. BCM 3.6.1 and newer versions of BCM softwarealso support the Poland profile (in download mode only). To allow the GATM to download theparameters for these countries and to allow for firmware upgrades, set all the country DIP switchesto 0 (zero/off) (factory default). The MSC telephony profile you choose must support theappropriate country setting to ensure that the correct firmware installs. Refer to Figure 72.Figure 72 GATM switch settings1 2 3 4 5 6ONMode select Country selectON1 2 3 4 5 6 7 8Rear of GATM For BCM 3.6 and newer software,ensure all switchesare offDip # Function1 Reserved2 Reserved3 Reserved4 Reserved5 Reserved6 Country 37 Country 28 Country 1
