CTP Systems CTPhone 1900, Applications Manual

Page: 63 / 132

DOC00101-01 3-15
CTPhone 1900 System Hardware & Software Installation
Ground Wire Requirements
Table 3-D provides the recommended gauge for ground wire based on the
distance between the CTPhone Controller and the master grounds bus on
the office telephone system. The proper gauge wire ensures that DC resis-
tance does not exceed 0.25 ohms.
CTPhone Controller Indicators
For information on CTPhone Controller LEDs, see the Diagnostics and
Troubleshooting chapter.
Adding Analog Line Modules to the CTPhone Controller
The CTPhone Controller supports a maximum of 8, 16, 24, or 32 CTPhone
handset users, depending on its configuration. You may add groups of 8
users to a CTPhone Controller configured for less than 32 users by install-
ing an Analog Line Module (ALM) in the CTPhone Controller.
Caution When unplugging an Analog Line Module, unplug the card from
connectors J4, J5, or J6 first before disconnecting it from the standoffs. Do
not apply diagonal pressure to the DIN connectors (see Figure 3-11 on
page 3-16).
Table 3-D. Ground Wire Requirements
Distance Between CTPhone Controller and
Master Ground Bus
Recommended
Gauge
0 – 18 feet 16 AWG
0 – 30 feet 14 AWG
0 – 46 feet 12 AWG
0 – 73 feet 10 AWG
0 – 113 feet 8 AWG
+
Installing an Analog Line Module in the CTPhone Controller
Step Procedure
1 Power down the CTPhone Controller.
2 Remove the screws securing the cover of the CTPhone Con-
troller case and lift the cover.