Interface Billing Questions and Answers
Interface Security Systems, LLC
8339 Solutions Center
Chicago, IL 60677-8003
Taxes and Fees
The Universal Service Fund helps keep local service rates affordable to all and provides discounts on services to schools, libraries and low-income families. The Federal level USF is assessed on approximate interstate calls.
Universal Service Fund – State
The Universal Service Fund helps keep local service rates affordable to all and provides discounts on services to schools, libraries and low-income families. The State level USF is assessed on approximate intrastate calls.
Telecommunications Relay Surcharge
Funds the telecommunications relay center which assists hearing and speech impaired individuals in communicating with others.
Sales Taxes – State and Local
Sales and Use taxes levied by the governing authority for each state, municipality, and county.
Communication Services Taxes – State and Local (range)
Communications Services taxes and fees levied by the governing authority for each state, municipality, and county.
Cost Recovery Surcharge
These surcharges recover part of the costs of local facilities and other costs associated with reporting to governing authorities.
If you believe there is an error on your bill or have a question about your service, please call Interface Security Systems, LLC customer support at (314) 595-0188.
If you are not satisfied with Interface Security Systems, LLC’s response, submit a complaint to the California Public Utilities Commission (CPUC) by visiting http://www.cpuc.ca.gov/complaints/. Billing and service complaints are handled by the CPUC’s Consumer Affairs Branch (CAB), which can be reached by the following means if you prefer not to submit your complaint online:
1-800-649-7570 (8:30 AM to 4:30 PM, Monday through Friday)
California Public Utilities Commission, Consumer Affairs Branch
505 Van Ness Avenue, Room 2003
San Francisco, CA 94102
If you have limitations hearing or speaking, dial 711 to reach the California Relay Service, which is for those needing direct assistance relaying telephone conversations, as well their friends, family, and business contacts. If you prefer having your calls immediately answered in your mode of communication, dial one of the toll-free language-specific numbers below to be routed to the California Relay Service provider.
|Type of Call||Language||Toll-free 800 Number|
|TTY/VCO/HCO to Voice||English
|Voice to TTY/VCO/HCO||English
|From or to
|English & Spanish||1-800-854-7784|
To avoid having service turned off while you wait for the outcome of a complaint to the CPUC specifically regarding the accuracy of your bill, please contact CAB for assistance. If your case meets the eligibility criteria, CAB will provide you with instructions on how to mail a check or money order to be impounded pending resolution of your case. You must continue to pay your current charges while your complaint is under review to keep your service turned on.
Are you having trouble using the telephone due to a hearing or speech disability?
Relay is a free telephone service that uses specially trained communications assistants to facilitate telephone calls between people with hearing and speech disabilities and other individuals. Calls can be made to anywhere in the world, 24 hours a day, 365 days a year. All calls are completely confidential. To make a relay call dial 7-1-1. Once connected to the relay service, tell the communications assistant the type of relay call you wish to make. Or, you may dial the specific toll-free number for the type of relay service.
Emergency Assistance: TTY callers should dial 911 directly in an emergency. All 911 centers are equipped to handle TTY calls.
Internet Protocol Captioned Telephone Service (IP CTS) Internet-based forms of CTS are available for those who would like to use CTS on a computer, tablet, or smartphone. Go to: www.fcc.gov/consumers/guides/internet-protocol-ip-captioned-telephone-service.
Computer (ASCII): Computer users can access Minnesota Relay. Set your communications software to the following protocols: speeds ranging from 300 to 2400; 8 Bits; No Parity; 1 Stop Bit; Full Duplex. When calling at a rate of 300 or below, follow the above using Half Duplex.
Hearing Carry Over (HCO): HCO allows a person who can hear clearly but who has very limited or no speech capability to make phone calls. Using a special text telephone, you type your conversation for the relay communications assistant to read to the other person, and listen directly to the other person’s response.
Hearing User: A hearing person may use a standard telephone or mobile phone to place a relay call and speak with a person who is deaf, hard of hearing, or speech disabled.
Internet Protocol (IP) Relay IP Relay combines text-based relay service with the ease of the Internet – no need for a TTY. You can make your relay call using a computer, laptop, tablet, or smartphone. Go to: www.sprintrelay.com.
Spanish Relay: Spanish speaking persons with a hearing or speech disability are able to make relay calls. This is not a translation service – both parties must speak Spanish, and at least one party must have a hearing or speech disability.
Speech-to-Speech (STS): STS allows a person who has difficulty speaking or being understood on the phone to communicate using his or her own voice or voice synthesizer. The communications assistant re-voices your words so that the other person on the call can understand them, and the other person speaks directly to you.
Text Telephone (TTY): This service allows a person who is deaf, deafblind, or speech disabled to use a TTY to communicate with the other person on the call.
Video Relay Service (VRS) VRS allows a person who uses American Sign Language (ASL) to communicate over the phone. The VRS user connects to the relay communications assistant via an Internet-enabled device with a video camera. The communications assistant relays the conversation back and forth between the parties – in ASL with the VRS user and by voice with the called party. Go to: www.fcc.gov/consumers/guides/video-relay-services.
Voice Carry Over (VCO): VCO allows a person with a hearing disability, but who wants to use his or her own voice, to speak directly to the other party. The communications assistant then types the other party’s response, which is displayed on the VCO user’s text telephone.
You may also file a complaint with the Federal Communications Commission:
ASL via VP: 1-844-432-2275
My question is not here. Where do I send my question?
Please send your question to firstname.lastname@example.org or call us at 866-593-3485 between the hours of 8:00 AM and 5:00 PM Central Time, Monday through Friday.
For complete list of departments, toll free numbers and an email form, please visit our CONTACT US page.