For SIP and SIPS messages belonging to pure SIP applications, the converged load balancer uses a consistent hash algorithm, by default. If any of the rules in the DCR file match the SIP/SIPS request, a hash key is extracted using that rule. If none of the instructions or rules in the DCR file match the SIP or SIPS request, a hash key is generated using the from-tag,call-id parameters of the request.