If the unit is programmed for programmable routing codes (*04#1#), it looks
for at least a 1.5 second pause in the dial string after at least 6 digits are dialed.
If this delay is seen it assumes that the next 3 digits are the routing code. If no
additional digits are seen within 2.5 seconds after the last digit dialed, the unit
outputs the remainder of the dialed number and then cuts through the call.
This timing restraint is required to insure that the network sees less than 4
seconds delay between digits, when a modem is used for dialing. Once one
digit of the routing code is recognized, the unit will allow up to 1.5 seconds
before the next digit. After the routing code is received the unit outputs the
remainder of the dialed number, and starts to look for any call progress
signals. If at least .6 seconds of call progress is seen (ringback) the unit starts to
output the transfer code corresponding to the received routing code. When the
acknowledge tone is received from the switch, the unit cuts through the call. If
at least 2 cycles of busy tone are seen the unit does not send the transfer code
and cuts through the call. This will allow the caller to hear the busy.
The programmable routing codes will always be 3 digits, with the first digit
always a zero. If the unit is configured for programmable routing codes, it may
be setup for an alternate call processing scheme by sending a routing code of
“1XX” instead of the standard “0XX”. (XX equals any two DTMF digits). When
the unit sees a “1XX” routing code it will not look for call progress signals, but
will instead look for the confirmation answer tone from the switch. (The
switch must be programmed to output this signal; by default it is off.) In this
mode the unit cannot monitor busy, or ringback.
With this method the Polling Controller will not send the transfer code until
the switch has answered.
When the Line Split Method is Six Digits the caller must use DTMF dialing.
Transfer Transmit Delay
When the Line Split Method is Six Digits, and the unit does not get the
expected response after dialing (ringback or busy for call progress, or
confirmation answer tone) , the unit will wait this programmable time period
and then output the transfer code. The time delay is programmable from 1 to
60 seconds. The default value is 16 seconds. This time value may need to be
extended to 20-30 seconds for some cellular connections
Number of Transfer Code Transmissions
This command allows the user to set the Polling Controller to give up after a
programmable number of transmissions of the transfer code, and restore the
line, even if there is no reply from the switch. If this value is set to zero the
Polling Controller will continue sending the transfer code until it gets an
acknowledge reply from the switch, or the polling modem hangs up.
Chapter 5: Polling Controller Operation
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