Figure 9 Ring Indicate Timing - Enfora Enabler II-G Integration Manual

Integration Guide
Version 1.01
6.8.2 Ring Indicate
The Enabler II-G module is capable of using the Ring line to discern the type of incoming call. The indicator
can be monitored via a hardware line available on the 60 pin I/O signal connector. The Ring Indicator pin is
#49.
The function of the Ring line depends on the type of the call received.
When the module is receiving a voice call, the Ring line goes low for 1 second and high for another 2
seconds. Every 3 seconds the ring string is generated and sent over the Receive (Data Out) (Rx) line. If
there is a call in progress and call waiting is activated for a connected handset or hands free device, the
Ring pin switches to ground in order to generate acoustic signals that indicate the waiting call.
Ring
2 seconds
2 seconds
1 second
1 second
RING String 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
3 seconds 3 seconds
RING String
RING String 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 II-G can be configured to send or not to
send URCs upon the receipt of SMS. See Enfora GSM/GPRS OEM Module AT Command Set Reference
- GSM0102PB001MAN.
Ring
1 second
URC
Figure 8 Ring Indicate Timing
GSM0108PB001 Page 27 1.01 – 01/21/05