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T25

T25

Xfinity Voice and DOCSIS® 3.1 Gigabit Cable Modem

60 Topics
120 Replies

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60 Topics

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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?

18 days ago

stchurch61The Many

asked in T25

Dead T-25

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

1 month 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.

1 month ago

JohnnyuThe Many

asked in T25

what router to purchase that is compatible with the T25 modem

1 month 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!

1 month 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

1 month 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.

2 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

2 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

3 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?

4 months ago

taylac5The Many

asked in T25

Router Name and Password

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

6 months ago

dgf333The Many

asked in T25

T25 A/C adapter

Will the SB8200 AC adapter work with the T25 modem?

6 months ago

agtpack12The Many

asked in T25

can’t connect to T25

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

7 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.

7 months ago

AaronThe Many

asked in T25

T25 SIP ALG

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

7 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.

8 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

8 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?

8 months ago

IslammidhatThe Many

asked in T25

Cancel a shopping order_T2

After I ordered T25 cable modem and voice, I realized it has no wi-fi built in. The order number #58818.I just ordered a few minutes ago.Could you help cancel the order and issue a refund?Thank you.

8 months ago

EMamrolThe Many

asked in T25

Arris T25

Here's my humorous situation. I'm not at home right now & I didn't take screenshots of my T25. I'm trying to find out the WiFi name & password so I can activate my Xfinity TV Flex box, landline & internet. I don't want to waste your time & no clue what the serial number is & whatnot. Left brochure w/ Arris customer service phone number at home. The other thing is I keep being misinformed what the proper Arris model is by Xfinity, Best Buy & Arris. Basically, I'm not the greatest techie, I need to at least verify the T25 will enable me to use my Xfinity Flex Box for my TV, my Xfinity landline & internet connection. I've purchased (3) Arris modems so far yet I keep jumping back & forth between Xfinity & Arris on the correct model. I can find out the Arris model I recently purchased from Amazon but I'd like to return it if the T25 serves my needs. I realize it's not your fault that I got stuck w/ (3) Arris modems so far. Rather humorous trying to sell m

8 months ago

mdsmith99The Many

asked in T25

Any firmware / software update for T25 ??

Any firmware or software updates to the T25 modem? It’s rare that any manufacture gets it right the first time around.

8 months ago

akharveysurfboardThe Many

asked in T25

caller ID issue - all incoming calls "Private caller" - T25

reference: ARRIS SURFboard T25 DOCSIS 3.1 Gigabit Cable Modem bought from AmazonXfinity has not fixed or identified any issue on their end. I’ve spent two 3 hour sessions with their support computers, techs, and elevated support. Xfinity support confirms we have the latest firmware, and have reset the modem many times as have I. I’ve tried several phone systems that perform on other systems as they should. (panasonic and Vtech). I’m reaching out to see if this is an issue with the T25 itself, as I have really run out of things to try. Any help, direction would be greatly appreciated.

8 months ago

PaulFThe Many

asked in T25

t25 from xfinity on optimum

Spent many hours on line/ on phone with Optimum trying to get a T25 xFinity working.Can anyone provide me with the correct reference/ firmware etc…..to I can get the Optimum (NY)tech team updated ? From other posts it seems this should work. Modem gets “Activated” by Optimum, goes through 3 cycles of reset (updates).At that point the LED indicates it is ON LINE…..however no connection is made to my computer or router.T25 Model # 613587-003-00 ( has a HFC MAC & MTA MAC #s, no CMAC like the old modem)All help and advice, appreciated.

8 months ago

mgalletlyThe Many

asked in T25

T25 password for GUI interface

I have a T25 on Xfinity.I tried to logon to the modem at 192.168.100.1 and username “admin” password of “password” returns invalid credentials.I don’t remember changing it, but I probably did at some point.How do I reset the device to default username and password? I’m sure I’ll have to re-register it with Comcast/Xfinity for it to work again, but that’s no big deal.I need to get information off of it, and see if maybe there’s a firmware update available, etc.

9 months ago

ElavyThe Many

asked in T25

Firmware version for T25

I found that my T25 has the following firmware:Firmware Name: TS11.02.057.12_092820_711.PC20.03Firmware Build Time: Mon Sep 28 17:37:14 EDT 2020 Three years seems awfully old. I contacted Comcast, and they supposedly pushed a firmware update, but I didn’t see a change. Does anyone know what the latest firmware version is? Thanks.

9 months ago

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