Hi Jacob,
The ethernet interfaces on the 1861 are a hybrid switchport / router port. They don't have the full switching capabilities and hardware, but they're also not routed ports.
Because of this some of this, some of the traditional switching commands aren't there or have changed a bit.
Most of the configuration in the auto qos voip cisco-phone doesn't apply because the hardware doesn't exist on the router to apply it.
You can use 'auto qos voip trust' instead.
As well, unless you have a very high amount of traffic going to a phone port, which is highly unlikely, QoS on this port probably will not do much.
hth,
nick