The answer can be pretty easily derived by looking at what issues are likely to be present that alternative communications methods would solve. Note that if you end up in a situation where verbal (or visual) communication is superior to this telepathy, you will still end up using radio for long-range communications, as it's the easiest means of long distance transmission of visual or verbal communications).
Looking at this as objectively as possible, given a very pessimistic interpretation of your description, you have a vast majority of the same issues here that you do with radio (interference, non-selectivity of transmissions, easily intercepted or blocked, shared media requiring regulation, etc), except all of those are much worse, because you can turn off a radio, but can't turn off your mind. In a case like this, it's very likely that people will either quickly find a way to block telepathy and then use some other form of communications, or, more likely, develop into a slightly more restricted form of collective consciousness akin to the Borg (and thus not need radio for communications at all).
Given a very optimistic interpretation though, you have a system very similar to a computer network as viewed from the application layer, and thus not many significant issues, and as a result radio would likely never develop as a means of direct communication, but would probably end up being developed as a means of broadcast communication, and possibly for things like music.
In both cases, it's likely to be developed for non-communications purposes such as radar, radio astronomy, and electronic communications.
It's probably worth noting that that pessimistic interpretation is the more likely one if this telepathy evolved before the development of sentience (coordinating a pack as a single unit is a huge advantage when hunting), while the optimistic interpretation is much more likely to be the result of an ability that was developed intentionally by an intelligent species (either through self modification, or through some form of external meddling), and something between the two is the most likely case if they developed it after developing sentience, but it originated naturally.