function tsip_session_subscribe(o_stack) {
    tsip_session.call(this, o_stack);
    this.__set(Array.prototype.slice.call(arguments, 1));
}
SIP <b>SUBSCRIBE</b> session.
@ctor
Signature: tsip_session_publish(o_stack, ...set())
@tparam tsip_stack o_stack SIP stack to use to create this session