Connecting a Viking M2W to the speaker leads of a 1416 phone is the down-and-dirty-easy-peasy way out. Works fine, lasts a long time. You can use an analog station or trunk port, but you'll need adapters for that and a talk battery source if you use a trunk port.

Sometimes the thoughts in my head get so bored, they go for a stroll through my mouth. This is rarely a good thing.