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M12 Hardware Design

M12_HD_V3.3 - 56 -

RI

Idle Ring

Off-hook by“ATA”

On-hook by “ATH”

SMS

received

HIGH

LOW

Figure 37: RI behaviour of voice calling as a receiver

RI

Idle Ring

Data calling establish

SMS

received

HIGH

LOW

On-hook by “ATH”

Figure 38: RI behaviour of data calling as a receiver

RI

Idle Calling

On-hook

Talking

HIGH

LOW

Idle

Figure 39: RI behaviour as a caller

Quectel

Confidential

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Quectel Cellular Engine 1
Confidential 10

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