This is a common problem. It comes from the traditional separation of work and personal life, and we are conditioned to respect the privacy of a person's time at home. Even though telecommuting means working at home, and often happens during normal business hours, some people still feel that a work-related call to the home is an intrusion.

Talk to your co-workers or clients and assure them that you want - and expect - them to call you if necessary, just as they would if you were in the office. This is one of the benefits of having a separate telephone line for your office at home; you can tell people that they won't be calling on the residence phone, and therefore won't be interrupting other family members or otherwise intruding.