Keystation Main Board; Hold And Ring Detect Board; Keypad Assembly - Telstra Commander E105 Installation And Maintenance Manual

Keystation Main Board

Hold and Ring Detect
Board

Keypad Assembly

Board Code - KSB-E-A (Keystation Main Board)
Location - Keystation
Board Description - This board contains a high-performance, single
keystation, system and data communications functions and contains the:
.
keystation power supply
.
speech and audio circuitry
.
data transrnit and receive circuitry
.
line control circuitry.
Board Code - HRDB-E
Location - Master Keystation
Board Description - This board contains circuitry that controls system
ring detection and line holding functions. It also accommodates the
internal music-on-hold feature. This board differs between Commander
Location - Keystation
Description - This assembly generates dialling and system function
signals. It consists of a rubber keypad and printed board assembly
connected to the keystation main board via a ribbon connector. The
assembly is controlled by a RISC processor. This processor also
handles keypad interfacing with the keystation Main Board.
Commander E105+ and E208+ Keystation