Yealink T31GThe T31P plus gigabit pass-through.

Why the T31G is on the catalog.

The T31G addresses exactly one weakness of the popular T31P: the 100M ethernet. For a phone-only deployment, 100M is plenty. But the moment users plug their workstations into the phone's PC pass-through port, the 100M chip becomes the bottleneck for file transfers, video calls, and any modern web app heavy on payload size. The T31G fixes that for $20 over the T31P.

Where the upgrade actually pays off: any office where workstations are daisy-chained through the phone (extremely common in cubicle deployments where each desk has one ethernet drop) and the network infrastructure is gigabit-capable. Multiply $20 across 20 desks and you have spent $400 to remove a real bottleneck — easily justifiable when a single file-upload delay costs more in lost productivity per week.

Where to skip the upgrade: phone-only desks with no daisy-chained PC, or sites where the upstream network is still 100M (rare in 2026 but possible in older buildings). In those cases the gigabit chip is wasted silicon — save $20 per desk and get the T31P. For four lines plus color, jump to the T33G at $20 more than the T31G.