FXS Module

The FXS module provides the Foreign eXchange Subscriber (FXS) interfaces. Each FXS module can provide up to 4 FXS port interfaces.

The following types of FXS modules are available:

FXS module for indoor FXS cable routing only (Catalog Part Number M1KB-VM-4FXS, Hardware Part Number GTPM00056). The device can house up to 6 of these modules (i.e., a total of 24 FXS ports).
FXS Module for indoor-and-outdoor FXS cable routing (Catalog Part Number M1KB-VM-4FXS-O, Hardware Part Number GTPM01046). The module is compatible with the following software versions:
Version 6.8: 6.80A.270.002 and later - up to 5 modules (i.e., up to 20 FXS ports)
Version 7.0: 7.00A.021.004 and later - up to 5 modules (i.e., up to 20 FXS ports)
Version 7.2:
Up to Version 7.20A.204 - up to 5 modules (i.e., up to 20 FXS ports)
Version 7.20A.250 and later - up to 6 modules (i.e., up to 24 FXS ports)
FXS module supporting indoor-and-outdoor FXS routing:
A maximum of 20 FXS channels (instead of 24) are supported for simultaneous ringing as well as for off-hook on long haul.
When six modules (i.e., 24 FXS ports) are installed, a maximum of 20 FXS channels can be active simultaneously.
The FXS modules support loop- and ground-start signaling.
The chassis can be installed with a combination of both types of FXS modules.