I have a customer who has an MLX-20L as their main console. They had some construction done and the console was disconnected and just now recently reconnected. The console is still on the same port/extension as before, and I'm assuming no programming changes have been made, but now they are unable to put calls on hold, transfer calls from that extension or make calls originating at that extension, but they can receive calls on the phone as normal. When they press the hold or transfer button on the phone, the line goes quiet for a second and then the call is resumed as it was rather than being put on hold on transferring to another extension. Does anyone know if this sounds more like a port issue or a phone issue?