Nortel Networks BCM200, 400 4.0 manual Gatm switch settings

Chapter 8 Installing a media bay module (MBM) 125

GATM switch settings

There are two models of GATM:

GATM 4: The GATM 4 provides connections for four analog calling line identification (CLID) or supervision disconnect PSTN lines. Each voice line uses one line in the DS30 bus offset. Because each DS30 bus has four lines per offset, you can assign a maximum of four GATM4s to a single DS30 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. Because each DS30 bus has four lines per offset, you require two offsets for each GATM 8. You can assign a maximum of two GATM 8s to a DS30 bus by making the offset switch settings different for each MBM.

You can also combine a GATM 8 with a 4x16 on the same DS30 number. When you choose an offset number for the GATM 8, the system automatically adds the next offset number. You cannot assign offset 3 to the GATM 8 because this does not allow the MBM to assign the second set of lines.

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 required for 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 software also support the Poland profile (in download mode only). To allow the GATM to download the parameters for these countries and to allow for firmware upgrades, set all the country DIP switches to 0 (zero/off) (factory default). The MSC telephony profile you choose must support the appropriate country setting to ensure that the correct firmware installs. Refer to Figure 71.

Figure 71 GATM switch settings

Rear of GATM

1 2 3 4 5 6

ON

Mode select

For BCM 3.6 and newer software, ensure all switches are off

1 2 3 4 5 6 7 8

ON

Country select

Dip #	Function
1	Reserved
2	Reserved
3	Reserved
4	Reserved
5	Reserved
6	Country 3
7	Country 2
8	Country 1

BCM200/400 4.0 Installation and Maintenance Guide