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Ontario Interpreting Services

Improve communication using our on-site or video remote sign language interpreters.

Our highly skilled interpreters use sign language and spoken language to provide clear two-way communication between deaf and hearing people at scheduled meetings and appointments, and in unforeseen emergency situations. 

Ontario Interpreting Services (OIS) has been the leading provider of quality interpreting services in Ontario since 1981. Our interpreters are: internally screened to evaluate their skills, required to undergo a security check, insured and supported through ongoing professional development and training.

Where we can help

When the exchange of information is crucial and complex, the most effective way to communicate with a person who uses sign language is through a professional sign language interpreter.

Our OIS interpreters are professionally trained in sign language and knowledgeable in the language and culture of both Deaf and hearing people. They provide communication in American Sign Language (ASL)- English, or la langue des signes québécoise (LSQ)- French.

Sign language interpreters are invaluable when a deaf person is:

  • at a job interview
  • at a medical appointment
  • in a business meeting
  • arranging a mortgage
  • reporting a crime
  • giving evidence in court
  • in crisis in a hospital, shelter, police station, etc.

Please view OIS Terms and Conditions here

How to pre-book Interpreting Services

For scheduled meetings and appointments:

  • bookings must be requested a minimum of 3 business days in advance
  • requests can be made Monday to Thursday from 8 a.m. to 8 p.m., and Fridays from 8 a.m. to 5 p.m.
  • interpreters are available during business hours, evenings, weekends and over holidays
  • services are available on-site or by video remote interpreting
  • anyone can request the service

Contact Ontario Interpreting Services, Central Booking

  • Phone: 1-855-656-3748
  • TTY: 1-877-843-0368
  • Skype: callois.chs
  • E-mail:
  • Fax: 1-855-656-3750


How to request Emergency Interpreting Services

In cases of a sudden, unforeseen crisis that requires immediate attention:

  • emergency services are offered 24 hours/day, 7 days/week, 365 days/year
  • emergencies may occur in: hospital emergency rooms; after-hours medical clinics; crisis centres; shelters; Police services; court settings; and child welfare cases
  • Emergency Interpreting Services may not be available at all times in all regions
  • anyone can request the service

Contact us:

  • Phone: 1-866-256-5142
  • TTY: 1-866-831-4657
  • E-mail: 
  • SMS/Text: 905-971-0564 (charges may apply)

Request Emergency Interpreting Services

When to use Video Remote Interpreting Services (VRI)

When on-site interpreting is not available, VRI services may be an option.

VRI enables deaf and hearing people in the same room to communicate through an interpreter who is located off-site via videoconferencing technology. Trained OIS interpreters provide service from private and secure individual suites.

We have partnered with Ontario Telemedicine Network (OTN), one of the largest telemedicine networks in the world, to ensure the videoconferencing technology we use in hospitals, medical centres and mental health facilities in Ontario is secure and of the highest quality.

When to use a Deaf interpreter

In cases where a deaf person has limited communication skills or uses non-standard American Sign Language (ASL) or gestures, it may be necessary to use a Deaf interpreter.

A Deaf interpreter is a Deaf individual with fluency in ASL and/or LSQ who has interpreting experience. A Deaf interpreter works together with a hearing interpreter to facilitate communication between a deaf person and a hearing person. Learn more about Deaf Interpreting

Ontario Interpreting Services are available through OIS Central Booking only. For other CHS services, contact us at a location near you:

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