Twitter users on Thursday will, for the first time, be able to make voice calls directly to each other through the microblogging service.

Jajah A new third-party offering from Jajah known as Jajah@call is expected to go into beta Thursday morning that will allow Twitter users to initiate a two-way voice chat with other users by typing "@call @username"--where "username" is someone's Twitter ID--into any Twitter client. During the beta period, the company said, the calls will be limited to two minutes, but the company will evaluate that length during beta. However, it sees the two minute period--after which the call will end--as "the verbal equivalent of a tweet".