Using The Power Control Signal; Figure 10 - Ring Indicate Timing - Enfora Enabler III-G Integration Manual

Enfora Enabler III-G
Modem Integration Guide
Ring
1 second
RING String
When a Fax or data call is received, Ring goes low and will remain low. Every 3 seconds a
ring string is generated and sent over the Receive (Data Out) (Rx) line.
Ring
RING String
An incoming SMS can be indicated by an Unsolicited Result Code (URC) which causes the
Ring line to go low for 1 second only. Using the AT+CNMI command, the Enabler III-G
module can be configured to send or not to send URCs upon the receipt of SMS. See
Enfora Enabler-III AT Command Set - GSM0308PB001MAN.
Ring
1 second
URC
6.6.3.

Using the Power Control Signal

Figure 11 shows a typical connection to the Enfora Enabler III-G module in a machine-to-machine application using
the external PWR_CTL_SIGNAL solution, where there is no external processor controlling the I/O, serial, or power
on/off states. RTC deep sleep functions will NOT function since the PWR_CTL_SIGNAL pin is tied low, the
processor will never stay in a "RTC Sleep" mode. To reset the module, power (BATT) must be cycled. VBAK
must be connected to an uninterruptible power source if RTC time is to be retained.
Note: RESET functionality is not supported on the Enabler III
GSM0308PB001
2 seconds
1 second
RING String
3 seconds
RING String

Figure 10 - Ring Indicate Timing

32
2 seconds
3 seconds
RING String
Version DRAFT – 2/9/2007