Telephone Entry; Figure 16: Telephone Interface Board, Adjustments And Indicators - Chamberlain SENTEX Infinity Series Installation Instructions Manual

C. TELEPHONE ENTRY
Test the telephone entry function as follows:
1. When the Infinity dials, the "OFF HOOK" indicator LED on the telephone interface board (see
Figure 16) should illuminate and the person dialed should receive the call.
2. Voice communications should be distinct and easily heard.
3. If the called party dials a "9" (either rotary or tone phones), the main relay should activate for
the programmed amount of time.
4. Dialing a "5" (tone telephones only) should activate the second relay if it is programmed as a
control relay.
5. If the person called has a rotary dial telephone, the "CLICK SENSE" indicator should light on
each click heard.
Before making any adjustments, the model of the telephone interface board must be determined
(model 1100329). Look for the number located on the upper left-hand edge of the telephone
interface board, preceded by the letters "ASSY". Refer to the appropriate circuit board shown in
Figure 16 for adjustments.
1564F3

Figure 16: Telephone Interface Board, Adjustments and Indicators

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Telephone Interface Board (SN1100329)
LINE
RING
CLICK LEVEL
VR3
CLICK
DETECT
Daughter Board (SN1110080)
LINE BAL 1
MIC
PANEL
SENS
MIC
Doc 6001565
OFF HOOK
CLICK LEVEL
PANEL
SPEAKER
J1
SPEAKER
LEVEL
VR4
LINE BAL 2
TELCO LINE
GROUND
HANDSET
TB1
Rev C