I was wondering what the latest and greatest opinions are on this board about doing SIP on the XTS? I've read most if not all of the posts on this subject dating back to 2010. I'll hopefully be moving this customer to an MBX one day, but right now they don't want to spend the money. I'll be upgrading them to 4.1 on an iss5 rev1.9 MPB1. At this point, is it mostly an issue of getting things fine-tuned with the providers, or are there still bugs in the XTS software? And does a VOIPE card work better than a LANB or vice versa? Any thoughts you guys have would be much appreciated. Thanks.