Comcast Business actually has several different TOS depending on when you signed your contract. Here is the link for their current TOS: http://business.comcast.com/smb/terms-conditions
This is a link for older TOS: http://business.comcast.com/smb/terms-conditions/terms-conditions-archive
I signed up in April of 2011 and in those TOS, it says nothing about being able to change the rates.
Article 3.1 from my TOS:
ARTICLE 3. CHARGES, BILLING AND PAYMENT
3.1 Charges. Customer shall pay Comcast one hundred
percent (100%) of the Custom Installation Fee prior to the
installation of Service. Customer further agrees to pay all
charges associated with the Services, as set forth or referenced
in the applicable Service Order(s) or invoiced by Comcast.
These charges may include, but are not limited to installation
charges, monthly recurring service charges, usage charges
including without limitation charges for the use of Comcast
Equipment, per-call charges, pay-per-view charges, charges for
service calls, maintenance and repair charges, and applicable
federal, state, and local taxes, fees, surcharges and recoupments
(however designated). Some Services such as measured and
per-call charges, pay-per-view movies or events, and interactive
television (as explained below in the Voice, Video and Public
View Video Additional Terms) may be invoiced after the Service
has been provided to Customer. Except as otherwise indicated
herein or on the applicable Service Order(s), monthly recurring
charges for Internet Services shall not increase during the initial
My initial contract has a $5.00 Equipment fee, which has been billed on my statement as "IP Gateway". As of the December bill, the name has now changed to "Equipment Fee" and has been increased to $7.00.
I was also told as of signing the contract that with Business Class the end user cannot use their own modem and is required to use a Comcast modem.
As a side note, last month I called them out on the fact that I was supposed to be receiving my single IP address at no cost, but they had been billing me the entire time for it. They stated they would credit my account, but that has not yet happened after almost 2 months. If I had any other high speed choice I would drop Comcast in a heartbeat. Unfortunately they have a monopoly here for high speed.
I will be calling them (yet again) to dispute and get as much credit as I possibly can...IF they actually give the credit they say they will give.