Our Popular "DOCSIS 3.0 Cable Modem Registration with DOCSIS T3 T4 Timeout Poster" is Back. DOCSIS T3 T4 timeout poster is 23 x 35 inches and a must have for your headend.  That's approximately two feet by three feet.  It's a nice size to hang up in your headend or in your office.  It's extremely popular and we only have a limited quantity left. We have a limited quantity of posters that we will be distributing at the SCTE EXPO or you can leave us a comment below