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 has no built-in Wi-Fi or Bluetooth radios and can be deployed over Ethernet without wireless dongles; confirm that this satisfies the organisation's device policy, because the model supports optional USB wireless adapters.

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. The touch screen provides access to contacts and settings, while hardware keys handle 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 touch-screen DSS keys. The screen brightness is adjustable. Dual USB-A ports on the rear of the phone allow connection of USB headsets, recording devices, or an optional Yealink BT40/BT41/BT52 Bluetooth dongle if Bluetooth connectivity is needed post-purchase (the DD10K is a DECT dongle, not Bluetooth).

Call quality on Australian NBN

It supports G.722 HD audio and OPUS for wideband and full-band voice respectively. Call quality depends on network stability, congestion, configuration and the SIP provider; wired Ethernet removes Wi-Fi as one source of variation but does not ensure consistent quality. The T48U has no built-in Wi-Fi or Bluetooth and uses Gigabit Ethernet by default, but supported USB dongles can add either wireless capability. 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. Follow the SIP provider's and router vendor's guidance for SIP ALG and QoS; disabling SIP ALG is common but is not correct for every router and deployment.

T48U vs T57W -- which should you buy?

The T48U and T57W both have a 7-inch 800x480 colour touch screen, up to 16 SIP accounts, 29 DSS keys and dual-port Gigabit Ethernet; the T48U has two USB 2.0 ports, while the T57W has one. 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, both models currently have advertised prices; compare the live listings before purchase. 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 may suit environments where an organisation's assessed security policy excludes built-in wireless radios; PCI DSS itself does not categorically prohibit wireless devices. 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 EXP43 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 may be the more practical purchase at a similar price because it adds built-in Wi-Fi and Bluetooth, although it has one USB port rather than the T48U's two. Buy the T48U when built-in wireless radios are not wanted and policy permits a handset that supports optional USB wireless adapters, or when the T57W is unavailable and this screen size is needed. For a full comparison of available handsets, see our SIP desk phone buying guide for Australia. For help choosing the right VoIP setup for your business, see our best phone system guide.

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 may be preferable where built-in wireless radios are excluded, provided the organisation's policy permits a handset that supports removable USB wireless adapters. 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 can operate over an NBN internet connection when supported and correctly provisioned by the chosen SIP provider; confirm handset compatibility with that provider before purchase. Follow the SIP provider's and router vendor's guidance for SIP ALG and QoS; disabling SIP ALG is common but is not correct for every router and deployment. The cabled Gigabit connection removes the variability of a local wireless path, but call quality still depends on the broader network, configuration and SIP service.

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. The number of active calls a single desk phone uses varies by role and workflow, but the T48U has 29 programmable DSS keys that can be assigned to BLF where the PBX and provider support it -- useful for reception or team lead desks tracking many extensions.