Pub. 42004-519C
Rugged VoIP Autodial Handset Telephones
Page 17 of 26
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Surface-Mount Installation
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OTE
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a GAI-Tronics Model 238-003 stainless-steel surface-mount enclosure (sold separately) is
required for surface mount installations.
1.
Remove the four screws securing the dust cover to the back of the telephone and discard the dust
cover.
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OTE
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The dust cover included with the Model 277-702BH and 277-702BHAC telephones is not
required for use with the Model 238-003 Surface-Mount Enclosure.
The Model 238-003 Enclosure includes rear and bottom access holes for cable entry. Use the rear
access hole(s) for a completely hidden installation or the bottom access hole(s) for conduit
installation.
2.
Pull all cables into the surface-mount enclosure.
3.
Terminate all cables to the telephone (see the Field Wiring section).
4.
Connect and configure peripheral I/O devices (see the Auxiliary I/O section).
5.
Attach the telephone’s front panel to the mounting flanges of the Model 238-003 Surface-Mount
Enclosure.
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Use the six #10-32 security machine screws supplied with the surface-mount enclosure kit
along with the flat black washers included with the telephone. Do not use the thread-cutting
screws supplied with the telephone in the Model 238-003 enclosure’s tapped holes. A Model
233-001 Security Screwdriver (sold separately) is required for installing the security screws.
Recommended torque is 10–12 in∙lb.
Field Wiring
Install all connections after pulling the field wiring into the rear enclosure (see Table 2 for recommended
conductor sizes and Figure 18 for wiring details).
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Consult the National Electrical Code (NFPA 70), Canadian Standards Association (CSA 22.1),
and local codes for the specific requirements regarding your installation. Install all equipment
without modification and according to the local and national codes. Class 2 circuit wiring must
be performed in accordance with NEC 725.55.
Recommended Cabling
Table 2. Recommended Cabling
Cable Use
Size and Type
LAN
Cat5 or Cat5e cable with RJ45 connectors
Power
Two-conductor, No. 22 AWG is typical
Inputs
Two-conductor, No. 22 AWG is typical
Output contacts
Two-conductor, No. 18 AWG is typical
