An optical penetrating adapter for mounting to a surgical portal to permit visualization through the surgical portal includes an adapter member defining a longitudinal axis and having a transparent window adapted to penetrate tissue and to permit visualization therethrough and means for coupling the adapter member to the surgical portal. A activation duration of at least one electrically operated injector determines the injected fuel quantity. For example, an exchange may use a point-to-point protocol which may dynamically determinediscover neighboring relationships between capable peer device interfaces and establish a suitable communication exchange between the capable peers.