A communication system utilizing an adjustable link has at least a first data transmission circuit including at least a first communication link circuit. The polymeric material which forms said upper layer and the polymeric material which forms said lower layer of the barrier sheet are mutually heat-sealable and said barrier sheet is folded up so as to superimpose two opposite sides thereof which are welded to each other by melting said upper layer at one margin and said lower layer at the other margin. At a first level, the control packets are rate limited per unique set of identifier keys per protocol. Thus, a push-to-talk switch that has enhanced reliability is provided. Such components may include a front or rear tether cut from the front or rear of the non-inflating peripheral region, a top tether cut from the top of the non-inflating peripheral region to control deployment of the second chamber, and a fabric shield cut from the top to at least partially wrap around the stowed inflatable curtain airbag. The main rod is formed of an upper rod, a lower rod and connection therebetween.