GHX-308A/616
HYBRID KEY TELEPHONE SYSTEM
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16
A. Before installing the MFU, turn off the power of system.
B. Insert carefully the MFU to connector “CN226” and “CN227” on the MBU.
MFU
Insert
MBU
CN227
CN226
[Figure 3-3] MFU INSTALLATION
C. After installing MFU, program the followings;
a) Assign the CO & the extension port for FAX. (FLASH 76)
b) Assign the detect timing of FAX tone. (FLASH 77)
3.9 CO/PABX CONNECTIONS
All CO/PABX line connections are made on the connector CO 1T/1R ~ 3T/3R.
CO/PABX lines are connected to terminals CO #T and #R on the MDF.
*. FR : Free Relay
1T 1R 2T 2R 1T 1R 2T 2R 3T 3R MBU
CO : Central Office
FR
CO
Line
LINE1 LINE2 LINE3
[Figure 3-4] CO/PABX LINE CONNECTIONS
3.10 KEY TELEPHONE/SLT CONNECTIONS
A. KEY TELEPHONE UNIT
Maximum 4 Key Telephones can be installed with GHX-308A Hybrid Key Telephone System.
Each Key Telephone requires 2-pair(4wires) twisted wiring cable be used to connect with MDF. The installer should
exercise caution when connecting a key telephone while system power on. The second pair(DT,DR) or wires supplies
the power (+30V) and the data. The first pair(VT,VR) supplies the power(GND) and the voice transmission. The power
polarity of wired connections must be maintained for proper operation. Care should be taken to ensure the telephones are
wired properly.
Color of Wires
Contents
MDF Terminal
Black
Yellow
Green
Red
Power (+) / Data Line
Power (+) / Data Line
Power (-) / Voice Line
Power (-) / Voice Line
DT#
DR#
VT#
VR#
a) Extension #100 is only the Key Telephone and connects to <DT,DR,VT,VR> terminals of
connector “K100” on the MBU.
b) Extension #101~103 are universal ports that SLT or Key Telephone can be connected by
user’s selection.
