This is teh central HDSDI matrix. It is 576 inputs by 576 outputs. We are currently wired for 388x388 and cards are installed to 288x288. Now go to DirecTV or Dish's uplink facility and you will find these switches 2000x2000. Still this size is one of the largest in use at a post production facility.
Inside the 3gbs HDSDI switch. Next to it but not in view is another 256x128 SDI switch that handles SDTV feeds.
The AES audio matrix. This is fully wired for 512 inputs by 512 outputs stereo. So that's essentially 1024x1024 mono. The routing system software is designed for 12 mono audio channels or more accurately 6 stereo pairs. However the central switch operates on stereo pairs with the ability to split those down further into discrete mono channels. The entire plant is AES digital audio at 48K, 24bit (not all sources are 24 bit however). There is no analog audio distributed. Analog conversion is done at the source or destination where needed such as an amplifier and speaker setup. In the next rack are matricies for timecode and RS422 data switching at 38.4K baud. Most machine control is still over dedicated RS422 ports. Only within the past few years has Ethernet gotten fast and reliable enough to take over this hardwired matrix system. Yet the legacy RS422 system will be around for many more years.
Just like the main video router matrix, the audio router is also surrounded by a patch system to isolate failures. These are old fashioned telephone TRS connectors, similar to a headphone plug, but still widely used. Some may ask why we don't just use the AES audio embedded in the HDSDI stream. Well we do at times since it's already there but in a production facility you need the flexibility provided by seperate audio routing. Broadcast facilities however generally don't have dedicated AES routers like this as they generally don't need to swap around audio channels. We do it for them when making the air masters
Also in this routing core area of the plant is a large KVM switch comprised of six Avocent 5000 series matricies. This allows any keyboard/monitor/mouse station to connect to any production computer. There are over 200 computers and 100 workstations. According to Avocent we are their only customer that installed a patch system around the switch matrices. Well what if one of those switch frames fail? And they are not plug in card based so repair/replacement is a long difficult process. We have to have a way to jump around them in an emergency. And one of Glimmie's mottos is there are basically only two types of switching power supplies. Those that have failed and those that will!