T25
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Compared across 7 stores. Prices are checked against each store and labelled with when.
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Price facts
- Last seen at $128.00 used at Mercari on Nov 14.
- Checked at 7 stores.
Our take on the T25
The SURFboard T25 is a DOCSIS 3.1 cable modem with built-in voice, certified for Xfinity Internet and Voice service. It handles plans up to 1 Gbps and has two Gigabit Ethernet ports plus two telephony ports for phone service. It suits Xfinity customers who want one box for internet and home phone and would rather skip the carrier's rental modem. Against DOCSIS 3.1 rivals, it is a modest, voice-focused unit: two LAN ports is fewer than many multi-port modems, and it works on Xfinity rather than on every cable provider.
- DOCSIS 3.1 with OFDM support for gigabit-tier plans
- Built-in voice with two telephony ports for phone service
- Two Gigabit Ethernet ports for wired devices
- Compact and light at about 8 oz
- Works with Xfinity Internet and Voice
T25 prices at every store
- MercariPre-owned
In stock
$128.00+ $17.95 shippingChecked 11 h ago - MercariPre-owned
In stock
$128.00+ $17.95 shippingChecked 11 h ago - eBayPre-owned
Out of stockSold by aokthrift
$39.00Free shippingChecked 11 h ago - Simple Cell ShopPre-owned
Out of stock
$129.95Free shippingChecked 11 h ago - WalmartNew
Out of stockSold by Tech Tech Store
$129.99Checked 12 h ago - Buyyourownmodem.comNew
Out of stock
$167.95+ $9.99 shippingChecked 11 h ago - Best BuyNew
Out of stock
$229.00Checked 12 h ago
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T25 price history
Lowest price we've seen: $68.96 on Nov 15 at Buyyourownmodem.com; $129.99 now. Tracked across 3 stores since Nov 15.
From Mercari
- ARRIS SURFboard T25 DOCSIS 3.1 Gigabit Cable Modem
- Certified for Xfinity Internet & Voice
- Black
- For plans up to 1000 Mbps
- Condition: Like new
- Shipping
- Ships from Missouri; estimated delivery Nov 17 - Nov 21.
- Packs
- Bundle discounts from this seller: 5% off 2+ items, 10% off 4+ items.
About the T25
The SURFboard T25 is a DOCSIS 3.1 cable modem with a built-in voice function.
It connects to a network over wired Ethernet through two 1-Gigabit ports. It also has two telephony ports and supports PacketCable specifications for voice over IP. The modem is backward compatible with DOCSIS 3.0.
- Modem type
- Cable modem, external enclosure
- Standards
- DOCSIS 3.1, DOCSIS 3.0, PacketCable 2.0, ITU T.38
- Carrier
- Xfinity
- Max transfer rate
- 10 Gbps
- Data transfer rate
- 1 Gbps
- Ethernet ports
- 2 x 1000Base-T RJ-45
- Telephony ports
- 2
- Modulation
- OFDM
- Line coding
- OFDM, 16 QAM, 64 QAM, OFDMA
- Communications
- Voice, Cable
- VoIP protocols
- PacketCable specifications
- Connectivity
- Wired
Questions and answers
- Does the T25 work with providers other than Xfinity?
- It is certified for Xfinity Internet and Voice. Other cable providers may not approve it, so check with yours before buying.
- Do I need a separate router with this modem?
- Yes. The T25 is a modem only, with no Wi-Fi. You connect a router to one of its Ethernet ports for wireless.
- What internet speed does it support?
- It is rated for plans up to 1000 Mbps and uses DOCSIS 3.1 with OFDM, so it fits gigabit-tier Xfinity plans.
- Can I use it for a home phone?
- Yes. It has two telephony ports and supports PacketCable, so it can carry Xfinity Voice phone service.
- How many devices can I plug in directly?
- Two, through its two Gigabit Ethernet ports. Anything else connects through a router or switch.
- Is it a good upgrade over an older DOCSIS 3.0 modem?
- If your plan is at or near gigabit, yes: DOCSIS 3.1 and OFDM support let it keep up where DOCSIS 3.0 modems cap out. On slower plans the gain is smaller.
- Where is the T25 cheapest?
- At Mercari, for $128.00, as of our latest check.













