If he wanted to "Troll" or insult you, he would have used the colloquial idiom
Go jump off the bridge.
in which case, he wouldn't send you a link to a web meeting (Unless the link is to a video in which he would swearing the living crap out of you, haha).
Free Dictionary defines 'bridge' as
- a connecting, transitional, or intermediate route.
- to join by or as if by a bridge.
The client referred the "Bridge" as the link between you and him. The very communication link (web conference link) is referred to as the bridge as it connects the both of you, sitting far apart. So the comm lines acts as the 'bridge' between the both of you. Since the link is given to you, the connection is already established. This means that the 'bridge' is already built and all that needs to be done now is for you to be a part of it. That is why he has used the phrase:
Jump into the bridge.
To "jump" is to join. So no, nobody is trolling you. Cheers.