This read-write setting controls how many of the dialed digits, if any, are forwarded to the remote unit, choosing between none and all via this object's enumeration. Setting it to none means a call placed on this channel carries no dialed-digit information to the destination device, while all forwards the complete dial string for onward routing, for instance to a PBX extension. For example, a port dedicated to a single fixed extension might be set to none since no digits need to be passed, while a port sharing access to multiple extensions would be set to all.