SIEMENS HICOM 120
PXML No. BABT/PXML/PBX.0049
The Hicom 100 series telephones above are (from left to right) Directory Keystation (Set 191 - Ultraset Memory), Expansion Module (Set 190 Ultraset T24 CD - used with Directory Keystation), DSS unit (Set 150 - used with Executive Keystation), Standard Keystation (Set 150 T16) and Executive Keystation (Set 151 T28)
The HICOM 120 (pictured right back) is a stored program controlled (S.P.C.) key telephone systems utilising
micro-processor control and analogue switching, (2 Wire), with analogue speech
There are special HICOM telephones. The Keyset 1 (see NTX24 ), Set 151 T28 (far right), Set 151 T16 (middle) or Set 191 (left) instruments may be supplied. DSS consoles are also available - Set 190 (front left) & Set 150 (middle rear).
All the system phones are 4 wire fed and the C & D wires are protected from short circuit by 200ma delay action fuses (F11 & F12 on LTB 1 & 2 boards).
All power requirements are provided from the 240V ac mains, maximum power consumption is
160 watts. During periods of power failure, 4 exchange lines are switched to emergency
Programming can be completed via a display terminal connected to Port 00 of the system or by a PC with PCSAT software installed.
Meter pulse boards (GEE) can be installed and these are connected next to the MDF. Each GEE card supports two exchange lines.
When installing the system, it must be remembered that the card frame swings outwards and space must be therefore left to the right of the system to allow the card frame to swing 90 degrees to the right.
The 110, 120, 125 & 130 systems were superseded by 150 & 100E series
Line Jack Wiring for Featurephones (use Secondary sockets)
For POT phones, just connect the A and B wires to terminals 2 and 5 in a master socket.
MOH Switch settings
External MOH is connected to X20 (moh1/moh2) on the motherboard.
Cover removal and access to system
The card frame is hinged on the right hand side and restrained by a Torx screw located centrally, towards the rear, at the top of the frame. Remove this screw and the frame will swing to the right exposing the MDF.
Last revised: December 18, 2011