Specifications

M80 Hardware Design
M80_HD_V1.0 - 66 -
RI
Idle Ring
Data calling
establish. On-hook
by “ATH”. SMS
received
HIGH
LOW
Figure 39: RI behavior of data calling as a receiver
RI
Idle Calling
On-hook
Talking
HIGH
LOW
Idle
Figure 40: RI behavior as a caller
RI
Idle or
talking
URC or
SMS Received
HIGH
LOW
120ms
Figure 41: RI behavior of URC or SMS received
Quectel
Confidential