Patent ID: 9654619
Date: 2017-05-16
CPC Classifications: H04L,H04M

Claim:
1. A non-transitory computer readable medium comprising instructions that when executed by a computer processor in a call handler in a contact center cause the computer processor to: retrieve a call record from a dialing list comprising a telephone number; ascertain a value indicated by a call attempt counter is at or below a threshold value, wherein the call attempt counter is associated with the telephone number; cause a call to the telephone number to be originated by using an Session Initiated Protocol (“SIP”) interface connected to a network service provider; receive from the network service provider a cause code parameter associated with the call in an SIP message; ascertain a cause code value indicated by the cause code parameter reflects the call was not offered to a remote interface associated with the telephone number; not increment the value of the call attempt counter in response to ascertaining the cause code value; retrieve the call record at a subsequent time; ascertain the value indicated by the call attempt counter is at or below the threshold value; and cause another call to the telephone number to be originated.