Dedicated Fibre or Bonded Cellular: Choosing How a Live Feed Reaches the Desk

Once a feed has been mixed, checked and cleared by the signal engineer, it still has to reach the channel or news desk that will use it. In my work as distribution coordinator there are two routes I am asked about most: a dedicated fibre or managed IP circuit, and a bonded cellular link that combines several mobile connections into one stream.

Both deliver broadcast-quality pictures when set up with care, and both can fail when they are chosen for the wrong job. The question I put to producers is rarely which is better in general. It is which suits this venue, this transmission slot and this level of tolerance for a dropped second.

This note compares the two plainly and ends with the recommendation we usually give. It covers delivery only. How the signal is captured and monitored at the venue is a separate matter handled by the signal engineer.

A dedicated circuit gives you a fixed, reserved path between the venue and the receiving facility. Its capacity does not change with the time of day, and the delay between the two ends is steady and easy to predict. That steadiness matters when a studio is cutting between its own presenter and a live outside source, because the producer can plan around a known delay.

The costs are real. Circuits must be ordered ahead, often with a lead time of days or longer, and they only exist where the provider can reach the building. A hall, a stadium or a regional studio with a permanent connection is a good fit. A field, a seafront or a car park is not.

A fixed circuit also tends to be bought for a defined period, so it suits recurring work better than a single afternoon.

• Steady capacity and predictable delay
• Needs advance ordering and a reachable site
• Best for recurring or long-running transmissions

Bonded cellular takes several mobile connections, sometimes from different networks, and spreads one video stream across them. If one connection weakens, the others carry more of the load. It can be set up in minutes and travels in a case, which is why it suits breaking news, street reports and locations nobody planned for.

The trade-off is that capacity depends on the mobile network at that spot and moment. A crowded festival field in the evening can leave the same kit with far less to work with than it had at the afternoon rehearsal. To protect the picture, the encoder lowers quality or adds delay, and the producer needs to know that before going to air.

This route rewards a site visit or a test at the same hour as the broadcast, rather than an optimistic guess made from a desk.

• Fast to deploy almost anywhere
• Quality and delay vary with local network load
• Needs a test at the time of day it will be used

Autumn brings a particular mix of work: evening news inserts, indoor events returning to calendars, and outdoor coverage that has to cope with early darkness and changeable weather. Weather rarely harms a fibre circuit inside a building, but it can affect rigged outdoor antennas and lengthen setup time for anything wireless.

For a scheduled programme from a known venue with a permanent connection, the dedicated circuit gives the producer fewer variables on the night. For a report from a flooded road, a harbour or a field, bonded cellular is often the only practical way to be live at all.

Mobile networks also carry more traffic in the evening hours, when many autumn events take place. That is a reason to treat cellular capacity as something to confirm, not assume.

Five questions usually decide it. Does the venue already have a connection we can use, and is it reserved for us? How much delay can the studio tolerate? What happens on air if the link degrades for ten seconds? Who at the receiving end confirms format and test times? And is the transmission a single event or a series?

Answers that point towards certainty and repetition favour the dedicated circuit. Answers that point towards speed, movement or an unknown location favour bonded cellular. Most producers can answer the first three in a short phone call, and we would rather have that call early than a rushed one on the afternoon of the broadcast.

Write the answers down and share them with whoever receives the feed. Mismatched expectations at the receiving end cause more trouble than most technical faults do.

• Is a reserved connection already at the venue?
• How much delay can the studio accept?
• What is the fallback if the link drops?

Where a permanent, reserved connection exists and the programme matters enough that a dropped second would be noticed, we recommend the dedicated circuit as the main path. It removes the largest unknown from the night.

Where the location is temporary, remote or changes at short notice, we recommend bonded cellular, tested at the actual hour of transmission and with a stated fallback agreed in advance with the receiving desk.

For important live slots, running both is sensible: the circuit carries the programme while a cellular link stands ready as a spare. The cost of a second path is usually small next to the cost of a blank screen, and it lets the producer keep working calmly if one route misbehaves.