This attribute specifies duration of the 'await response' supervisory
timer which applies to non call-associated sessions providing
bearer-independent connection-oriented transport for supplementary
services. The timer is started at the ingress Passport when creation
of a virtual circuit with the egress Passport is confirmed and stopped
when the first message from the destination PBX is received. If the
timer expires, the non call-associated session is cleared.
The 'await connection' timer (attribute connectServiceTimer)
together with 'await response' timer (attribute
responseServiceTimer) provide equivalent of the T-ACTIVATE
timer described in the relevant supplementary service specifications.
A change of the timer value does not apply to timers already
running.