Yealink T48U Review -- Australia 2026

Who is this phone for?

The T48U is the right phone when a large touch-screen is the primary requirement and the desk has a cabled network connection. The 7-inch screen makes it Yealink's most visually prominent T-series handset -- it is appropriate for executive desks where the phone is a visible fixture, reception desks managing a high contact volume, and team leads who need quick access to BLF monitoring across many keys. Buy it for: executive offices, reception desks, call centre-style deployments in SMBs, and any position where the phone is used heavily throughout the day and a large, easy-to-read touch interface would increase efficiency. The main decision point against the T57W: the T57W has built-in Wi-Fi and Bluetooth; the T48U does not. At similar Digiphone pricing, the T57W is technically the more capable phone for most desks. The T48U is the right choice when you specifically need a wired-only phone -- for example, in a security-conscious environment where Wi-Fi-capable devices are excluded from desk deployments, or where IT policy prohibits wireless connectivity at the device level.

Specs at a glance

Build quality and design

The T48U has a larger physical footprint than any other phone in the standard Yealink T-series. The 7-inch screen dominates the top two-thirds of the phone's face, with the keypad and function keys beneath it. The touch interface is responsive and clearly labelled. Most users navigate primarily via the touch screen for contacts and settings, while keeping hardware keys for calls and volume. Build quality is consistent with other Yealink T-series phones: solid plastic construction designed for commercial office environments, adjustable tilt stand with two positions, and clear LED indicators on the DSS keys. The screen brightness is adjustable and visible in normal office lighting without glare issues. Dual USB-A ports on the side allow connection of USB headsets, recording devices, or the Yealink DD10K Bluetooth dongle if Bluetooth connectivity is needed post-purchase.

Call quality on Australian NBN

The T48U delivers the same call quality as other Yealink T-series phones in its class. It supports G.722 HD audio and OPUS for wideband and full-band voice respectively. On a correctly configured NBN connection with SIP ALG disabled and QoS enabled for voice traffic, call quality is clear and consistent. The T48U connects via cabled Gigabit Ethernet only. This is an advantage in terms of call reliability: there is no wireless path to introduce signal variation, and the phone's network connectivity is not affected by Wi-Fi congestion or interference from other devices in the office. For any AU NBN deployment, the standard setup checklist applies: disable SIP ALG on the router, enable QoS prioritisation for voice, and ensure upload bandwidth is sufficient for the number of simultaneous calls your business takes.

T48U vs T57W -- which should you buy?

The T48U and T57W have very similar core specs: both have a 7-inch 800x480 colour touch screen, 16 SIP lines, 29 DSS keys, dual USB-A ports, and Gigabit connectivity. The key difference is wireless capability: the T57W has built-in dual-band Wi-Fi and Bluetooth 4.2; the T48U does not. At Digiphone, these phones are priced within a few dollars of each other. In that context, most businesses are better served by the T57W: the built-in wireless capability adds flexibility, and the Bluetooth support means Bluetooth headsets can connect without a dongle. The T57W's premium over the T48U is negligible when the wireless capability is available. The T48U is the deliberate choice in environments where wireless capability is a specific exclusion: PCI DSS compliant zones, government facilities, environments where IT security policy requires wired-only devices, or managed network deployments where wireless-capable handsets require additional security approval. If none of those constraints apply, the T57W is the more practical purchase.

What works / What doesn't

Australian pricing and where to buy

The T48U is stocked by Digiphone and major AU IT retailers. Current pricing is around $369-$399 AUD. Prices on this page are updated nightly via StaticICE. Compare current pricing of the T48U against the T57W before purchasing -- the difference is small, and the T57W's built-in wireless capability may make it the better value at a similar price. The EXP50 expansion module is available separately from most Yealink stockists for larger deployments needing additional BLF keys.

Verdict

The T48U is the right phone when a 7-inch touch screen is required and wireless capability is either not needed or specifically excluded. In most cabled office environments, the T57W is the more practical purchase at a similar price because it adds Wi-Fi and Bluetooth without a trade-off. Buy the T48U when your deployment requires a wired-only phone, when IT policy excludes wireless-capable handsets, or when the T57W is not in stock and you need this screen size now.

Frequently asked questions

Can the Yealink T48U connect to Wi-Fi?

Not built-in. The T48U does not have internal Wi-Fi. If wireless connectivity is needed, the Yealink WF50 USB Wi-Fi dongle can be connected to one of the T48U's USB-A ports. For a phone with built-in Wi-Fi at a similar price, consider the Yealink T57W instead.

T48U vs T57W -- which is better for Australian offices?

For most Australian offices, the T57W is the better choice at a similar price because it includes built-in Wi-Fi and Bluetooth that the T48U lacks. The T48U is preferable in environments where IT policy requires wired-only devices, or where wireless capability is a security exclusion. Check both prices before deciding -- the premium for the T57W is often small enough to make it the obvious choice.

Does the Yealink T48U work on NBN in Australia?

Yes. The T48U is a SIP phone compatible with all NBN connection types and all major AU SIP providers. Disable SIP ALG on your router and enable QoS for voice traffic for best performance. The cabled Gigabit connection ensures consistent call quality without the variability of a wireless path.

How many lines can the Yealink T48U handle at once?

The T48U supports 16 SIP accounts and 29 programmable DSS keys. In practice, the number of simultaneous calls depends on your VOIP provider plan and the number of SIP lines provisioned. A single desk phone typically uses 1-2 active calls at most, but the T48U can monitor 29 BLF keys across the 4 programmable pages -- useful for reception or team lead desks tracking many extensions.