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T25

T25

Voice and DOCSIS 3.1

50 Topics
100 Replies

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50 Topics

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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

1 month ago

dgf333The Many

asked in T25

T25 A/C adapter

Will the SB8200 AC adapter work with the T25 modem?

2 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

2 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.

2 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.

3 months ago

spossosThe Many

asked in T25

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

4 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.

4 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.

4 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.

4 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.

4 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.

5 months ago

directoritopsThe Many

asked in T25

CM MAC NUMBER for modem activation T25

I am activating a new modem. The app tells me to enter the CM MAC ID. There is a MTA MAC ID or a HFC MAC ID which are different. Which MAC ID am I to enter?

5 months ago

yrdwThe Many

asked in T25

Use T25 Modem as Voice Gateway Only

I bought a T25 modem to use only for a voice line. I have an SBG8300 Modem / Router, and need to connect the two. I can’t seem to figure out the correct sequence and configuration for the 2 devices.Any help would be greatly appreciated. Thanks in advance.

5 months ago

Len_JacobsonThe Many

asked in T25

How To Find My Arris Router's Settings for T25

I have an Arris T25 router in place for a few years and suddenly, it seems that it is blocking traffic coming to my router on Port 21. I need to see my settings, but entering 192.168.86.1 into a browser simply tells me it’s ONLINE; it doesn’t show me my settings.Can you please tell me how to see my settings?Thank you.Len Jacobson

5 months ago

steve-tuttleThe Many

asked in T25

how to change WiFi password on T25 modem?

I need to change my WiFi password. The T25 was provided by my A/V contractor (so I wouldn’t have to rent from Xfinity). The Arris consumer care instructions says to access cable modem interface and that does not work (you get an error code, I’ve tried from a PC and an iPad). The Xfinity instructions do not work either. They say their instructions only work with Xfinity provided modems

6 months ago

steve-tuttleThe Many

asked in T25

change WiFi password for T25 modem

I have a T25 modem that my A/V contractor installed (so I wouldn’t have to pay Xfinity a monthly rental). I’ve tried YouTube and the internet. shown online does not work

6 months ago

LotusM50The Many

asked in T25

Hardware and software version for t25 modem

I see 2 different T25’s with different specifications. Are there 2 versions? On older one and an updated one?I see one with “32 downstream x 8 upstream DOCSIS 3.0 channels, 2 downstream x 2 upstream OFDM DOCSIS 3.1 channels” & 2GB max speed, and another with “32 downstream x 8 upstream DOCSIS 3.1 bonded channels and 2 downstream x 2 upstream OFDM channels” with with up to 10GB speed, without any mention of the DOCSIS 3.0 spec.What’s the difference? Hardware, firmware, or something else? Thanks!

6 months ago

errachitThe Many

asked in T25

surfboard t25 not connecting with all modem lights on

My surfboard T25 suddenly stopped connecting to internet and all modem lights are constantly ON even after I restarted and resetted multiple times.

6 months ago

jplwThe Many

asked in T25

slow speed connection in T25

Xfinity just raised my upload speed from 25 to 100, yet I do not get the higher speed, even after restarting the T25. Should the T25 be able to support 100 UP? Is this an Xfinity issue? As usual, XFinity is brain-dead on this topic.

7 months ago

jsowersThe Many

asked in T25

voice issues T25

No dial tone

7 months ago

lpreynaudThe Many

asked in T25

Accessing WebManager

I recently installed a new T25 modem at home. Everything seems to function OK but when I try to login to the Web Manager at 192.168.100.1 I get a 404 Not Found error. Does anyone have any idea what I’m doing wrong?

8 months ago

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