CTI (Computer Telephony Integration) is technology that links computers with telephone systems. Its most representative feature is the "screen pop," which searches a CRM (Customer Relationship Management) system using the caller ID on an incoming call and automatically displays customer information on the operator's screen. Click-to-call (initiating a call from an on-screen click) and automatic call recording with transcription also fall under the CTI umbrella.
CTI is indispensable in call centers. Operators can review the customer's name, past inquiry history, purchase records, and subscription plan on screen before even answering the phone, identifying the customer without needing to ask "May I have your name?" This can shorten average handling time (AHT) by 15-30 seconds - a significant efficiency gain for call centers handling hundreds of calls per day. Customers also benefit from not having to repeat the same information every time, improving satisfaction.
The most common integration target for CTI is CRM. Systems like Salesforce, kintone, Zendesk, and HubSpot are connected to the phone system via API, automatically searching customer records using the incoming number as the key. Combined with PBX, IVR, and ACD, an integrated workflow becomes possible: IVR collects the caller's purpose, CTI displays it on the operator's screen, and ACD routes the call to the best-skilled operator.
The spread of cloud-based CTI services has dramatically lowered the barrier to adoption. Previously, integrating an on-premises PBX with a custom-built system cost millions of yen, but a cloud PBX combined with SaaS CTI can be used from just a few thousand yen per month. Even small and medium businesses can now elevate their phone support quality to enterprise levels. See Call Center Quality Tips for CTI use cases.