The cost to install a phone jack and wiring is anywhere from $100 to $400 on average. You can work with a local electrician or a general contractor to install a phone jack. Complicated installations that require detailed electrical work ups the price above $400. Additionally, this is for a single line. Expect to pay more if your home office is built to accommodate more than a single person.
The cost to repair a telephone system is between $90 and $210 on average. This cost varies depending on the type of system you have installed and what repairs you need. In other words, repairing a single line costs much less than fixing a hiccup in the overall system or network. Comprehensive business phone systems benefit from routine maintenance visits to keep costs down.
Computer networking costs between $190 to $640, though installing a whole network from the ground up costs as much as $6,000. Prices vary depending on how much work is needed to get your network up and going. For instance, locations may require trenches to be dug outside for cables in addition to extensive electrical work.