Othala is a galaxy named in honour of their original home planet by the Asgard and served as the galaxy in which they resided for their final years. This galaxy was never shown to have a stargate network.
The Othala galaxy was chosen by the Asgard as the new location for their home after they were forced to abandon their original home galaxy due to the increasing threat of the Replicators. They settled and rebuilt their civilization on the planet Orilla. However, their colony planet, Hala, was infected by Replicators and they were forced to evacuate the planet and install a time dilation device to trap the Replicators in order to give them more time to find a way to destroy the Replicators. Two years later the Asgard decided to destroy Hala by collapsing the sun of the system into a black hole. In 2007, the Ori launched an attack on the planet Orilla. This forced the Asgard to speed up their plan to commit mass suicide after failing to solve their genetic problem, leaving their technology only to the Tau'ri to preserve their legacy. (SG1: "Unnatural Selection", "New Order, Part 1", "New Order, Part 2", "Unending")