Programming instructions

BASIC CALL HANDLING PROGRAMMING TASKS DX-120 Programming Manual
- 202 -
Specifying Ring Abandon
• The system allows you to set the ring abandon time. Ring abandon is the interval the system waits for the next
ring before classifying the call as dropped from the CO trunk.
• Typically, CO ring cycles include one second of ring (voltage) followed by three seconds of no ring (removal of
voltage). It is possible for COs to vary from this pattern, and if your customer’s CO varies this way, you may need
to adjust the default ring abandon setting.
• A longer ring abandon gives the system more time to realize the absence of CO trunk ringing, but while the
system waits it continues to ring the extension. If in fact the call has been dropped by the trunk, the extension
user can receive dial tone when picking up a ringing line.
• The ring abandon time starts when the CO trunk ring (voltage) occurs, and includes the interval after the ring
(removal of voltage). So, if the CO is using the 1/3 pattern, a ring abandon time of 10 seconds means the system
will wait another 6 seconds for a ring (voltage) to occur before classifying the line as a ring abandon and stopping
the system ring at the extension (1 second ring + 3 seconds no voltage + 6 additional seconds no voltage = 10
seconds).
• A short ring abandon (<4 seconds) means the system may drop the call before the CO trunk can present voltage
again. In this case the system rings the extension once and abandons the call.
SPECIFYING RING ABANDON VIA PC-DBA
From the PC-DBA main screen:
Specifying Ring Abandon via PC-DBA (continued on next page)