
Understanding the Circuit Boards
The FX II accepts up to eight circuit boards. Two of the board slots are dedicated to the CPU/Services
board and the Auxiliary board while the remaining six slots accept either line or station boards. Some
of the circuit boards (such as the Auxiliary board) hold special-purpose circuit cards that mount
directly on the boards.
FX II circuit boards include the following:
Auxiliary Board
A utility board that provides interface for a maximum of three special-purpose circuit cards such as
communications cards, DTMF receiver cards, and E1 or T1 synchronization cards. Actual makeup
requirements depend upon system configuration. In addition, some versions of the Auxiliary board
provide DTMF receivers to support outward dialing of a population of industry-standard telephones.
In addition, some versions of the Auxiliary board provide DTMF receivers to support outward
dialing of a population of industry-standard telephones, additional COM ports, and provides
interface for expansion components.
Services Board with CPU Card
The Services board (FXSRV-EX or FXSRV2-II) provides an interface for music-on-hold and
background music inputs; it also provides an output to an external paging amplifier. The Services
board includes four dry-contact relays for external control functions. The Services board includes 4
dry-contact relays for external control functions, one DTMF receiver, and the internal remote
maintenance modem.
The CPU card (FXCPU-EX or FXCPU-2) attaches to the Services board and provides central
processing and control for the system and other miscellaneous functions. Memory chips that attach
to the CPU card provide flash memory for operating system control. The CPU card has two serial
data ports, which are for PC-based programming, a serial printer, or other applications.
16 – Reviewing the Hardware
GCA40–242 General Description
Komentáře k této Příručce