- - Explore the Community
SURFboard.com

Community
eMTA - Voice enabled Modems & Wi-Fi Modems
T25

T25

Xfinity Voice and DOCSIS® 3.1 Gigabit Cable Modem

67 Topics
138 Replies

When you subscribe we will email you when there is a new topic in this category

67 Topics

AzwaynickThe Many

How to remove a refurbished modem from the original account on T25

I bought a refurbished T25 but I can't add it to my ISP because it is still registered on someone else's account. Any ideas?

325

1 day ago

emsodoThe Many

asked in T25

T25 can't check or update firmware

I have a T25 modem and XFinity as my cable provider. Apparently I am not getting the internet speeds available because the firmware on my modem is not up to date. There is no information about the firmware version on the surfboard app that is connected to the device, and I'm also not able to log into the modem settings using the IP address and any browser. I just get an error message saying that that IP address cannot be accessed. Of course my warranty on the modem just ran out last month, and I do not want to pay $40 to access the surfboard customer service. Has anyone had this issue where they cannot locate the firmware version let alone log in to their account to update it?I am aware of the disputes between weather it is Xfinity or Arris that has the capacity to update the firmware. I was just on a very long phone call with Xfinity and they are insisting that it is nothing on their end to update the firmware. I have unplugged the modem several times to force a reset, but without bei

LimbmydogThe Many

I just bought a new router Wi-Fi combo and it’s not working. I don’t see any green lights like it says

162

1 month ago

AsjrizThe Many

asked in T25

Activate T25 without the label and with Xfinity blocking logon until I provide the MAC number

I recently purchased a used Arris T25, I later learned that there is no label, I know I can get the device information like serial number and Mac number if I can log onto the device, it appears to be connecting fine when I attach it to Xfinity coaxial cable, but Xfinity blocks use of the device until activation which requires Mac number.Is there any other way to get the information on this device?

DivasdenThe Many

T25 will not show up so I have no service. Xfinity says it's working but I can't find it to connect anything to it

281

2 months ago

tuemseThe Many

asked in T25

T25 phone connection is not working

I connected my T25 to Comcast finally and it’s working very well except that I do not have phone service yet. Do I need a separate connection with Comcast or how do I get the phone to work?

372

2 months ago

eyez4yu2The Many

asked in T25

Slow speed internet connection on T25

My T25 is supposed to accommodate up to 800 MBPS. Xfinity assures that they’re providing 1000 MBPS, but I get only 400 MBPS. Please advise.

301

2 months ago

sub720The Many

asked in T25

t25 cable modem power supply plug does not fit

i recent bought a Arris T25 cable modem pn 613587-003-00. The included power supply Ktec Ks051867 plug does not fit into the cable modem power input. I tried looking on the Arris support website for the model number of the ac adapter but could not find it. The ac adapter is 12V 2.5a so should work. Any help would be much appreciated.

131

2 months ago

issaquahThe Many

asked in T25

Two phone number on one port - T25

Comcast provided me with two phone numbers. On my previous Arris modem they could configure the modem so both phone numbers were accessed thru one jack on the modem. Comcast claims this is not true on the T25. Must I use both jacks on the modem in order to have both phone numbers?

stchurch61The Many

I purchased a T-25 at Best Buy on June 5, 2024 and successfully activated for Internet and phone service with my provider. Today I returned home and all of the lights were off on the modem and I didn't have Internet or phone service. I tried resetting use the button on back but nothing. Can you provide any other troubleshooting advice or instructions for repair/replace? Thanks

353

4 months ago

GamedoreThe Many

asked in T25

Password reset on T25

I received a used t25 modem from a realtor friend of mine. I do not have have access to the password, and I don't see it anywhere on the modem. Is there a way to reset it without having the old password? Thanks.

541

4 months ago

JohnnyuThe Many

asked in T25

what router to purchase that is compatible with the T25 modem

171

4 months ago

ttripoltThe Many

asked in T25

Unable to Login GUI portal on T25 problem

I am unable lo log into the T25 Surfboard modem with 192.168.0.1 What am I missing? Please help!

571

4 months ago

RtarbellThe Many

asked in T25

Issue on Xfinity Stream with T25

I recently purchased and activated a new T25 modem with voice. Having a problem with the Xfinity Stream service. Xfinity stream works fine for a few days before becoming non-functioning on all devices. After many failed attempts to restore stream service, I've found that going through the modem activation prosess restores Xfinity Stream. Any suggestions on what to do to avoid repeating the activation procedure? Modem works fine otherwise.

453

5 months ago

seattlerustThe Many

asked in T25

Connecting Voice Modem to other phones - T25

I recently moved from my long time home to an apartment. I was receiving xfinity phone service through a voice modem and had numerous phone jacks in the house, all of which worked through the single modem’s connection. In my new apartment, I have a number of phone jacks but can’t find a way to make them work with my new Arris T25 Modem. Only the phone attached to either of the two outlets on the modem will be connected. I tried connecting the modem to one of the jacks, then nothing worked. Any thoughts?Thanks,SR

923

5 months ago

sullivanmmsmThe Many

asked in T25

Wi-Fi name and password setup of T25

I am unable to see my newly setup T25 modem to change the network name and password on the xfinity app

1511

6 months ago

StatmanThe Many

asked in T25

SSID for 2.4 GHz for T25

I know I am supposed to find the SSID and WiFi Key on the white label on the bottom of the Arris Model T25, but it is not there. Now what?

661

7 months ago

taylac5The Many

asked in T25

Router Name and Password for T25

My Arris T25 is activated and is connected to the wifi but I do not know the network name or password. Please help

dgf333The Many

Will the SB8200 AC adapter work with the T25 modem?

agtpack12The Many

I connected my new modem, cable is working but I can’t connect the internet and phone

2273

10 months ago

wyoboyThe Many

asked in T25

How to see connected devices on T25?

I have a T25 used for Xfinity voice/internet--i can login to it on 192.168.100.1 but the limited information there does not allow settings changes nor does it show a tab for “Connected Devices”--my prior Arris did show this information. So how do i find that info as well as a settings page that goes beyone the limited info on 192.168.100.1? I tried logging into the IP address of the T25 but nothing happens.

AaronThe Many

Does this modem support the SIP ALG setting? Need to have this disabled because it is interfering with VOIP calls.

371

10 months ago

spossosThe Many

asked in T25

Port forwarding on T25

Hello, I would like to know how to manage port forwarding on the T25 Modem. Thank you.

601

11 months ago

GbeltranThe Many

asked in T25

2nd port is not working on

Surfboard t25 is only working in one Ethernet port reset it many times and still only pone port working

1202

11 months ago

sumandasThe Many

asked in T25

Can T25 support higher (240Mbps) upload speed?

Is the T25 modem capable of supporting 240 Mbps upload speed. It is rated to support 8 upstream channels - but my current device shows only 4 upstream channels are enabled. With 4 upstream channels I can only theoretically get 4x30 ~120 Mbps.Does anyone know what upstream frequencies comcast use? There isn’t enough bandwidth in the RF split (5-42 MHz) to support 8 channels so the diplexor config of 5-85 MHz need to be enabled to get full 8 channels. Does comcast need 4 upstream channels with 2x2 MIMO for its 200 Mbps upload speed or does it utilize 4 channels?

831

11 months ago

Page 1 / 3

Terms & Conditions Cookie settings

Sign up

Already have an account? Login

Username *

E-mail address *

Password *

I accept the terms & conditions

loginBox.register.email_repeat

Login to the community

No account yet? Create an account

Username or Email

Password

Remember me

Forgot password?

Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.

Enter your e-mail address

Back to overview

Scanning file for viruses.

Sorry, we're still checking this file's contents to make sure it's safe to download. Please try again in a few minutes.

This file cannot be downloaded

Sorry, our virus scanner detected that this file isn't safe to download.