The worlds of sales development and voice AI are full of jargon. This glossary defines the terms that actually matter — in plain English, with links to deeper resources where they help. Whether you are evaluating an AI receptionist, building a sales team, or just trying to follow the conversation, start here. Terms are grouped by theme.
Call handling & customer response
Speed-to-lead
How fast a business responds to a new inbound lead. The first minutes are decisive — responding within one minute can lift conversion substantially, and most customers buy from the first business that responds. See our speed to lead statistics.
Lead response time
The elapsed time between a lead reaching out and the business making contact. Closely related to speed-to-lead; the metric most teams underestimate and the one that most directly predicts conversion.
Missed call
An inbound call that goes unanswered. Because roughly 85% of callers who reach voicemail never call back, a missed call is usually a lost sale — not a deferred one. See our missed call statistics.
Voicemail abandonment rate
The percentage of callers who hang up rather than leave a voicemail. For business lines this is high — over 97% of callers do not leave a message — which is why voicemail is an ineffective safety net for missed calls.
After-hours coverage
The ability to answer calls outside standard business hours. Critical because 48% to 72% of calls arrive after hours depending on the industry. See after-hours call statistics by industry.
Warm transfer
Connecting a caller to a live person along with context about who they are and why they are calling, rather than a cold hand-off. An AI receptionist can perform a warm transfer by briefing the on-call staffer before connecting the call.
First call resolution
Resolving a caller's need on the first contact without requiring a callback or follow-up. High first-call resolution improves satisfaction and reduces the volume of repeat calls.
Call abandonment rate
The percentage of callers who hang up before reaching a person — whether stuck on hold, in a phone tree, or at voicemail. Lower is better; instant answering drives it toward zero.
Voice AI & answering technology
AI receptionist
A voice AI agent that answers inbound calls in a natural voice, handles common requests, books appointments, and routes calls by rule. Provides 24/7 coverage at a fraction of human-staffing cost. See our AI receptionist and the statistics behind adoption.
Virtual receptionist
A broad term for any remote or automated service that answers calls on a business's behalf. It can refer to a human service or an AI agent; modern usage increasingly means an AI receptionist.
Answering service
A service that answers calls for a business, traditionally staffed by human agents and billed per minute. AI answering services deliver the same coverage without per-minute surge pricing.
AI voice agent
The underlying conversational AI that powers an AI receptionist or outbound caller — it understands speech, responds in a natural voice, and takes actions like booking or transferring.
AI outbound calling
Using a voice AI agent to place outbound calls — for example, calling back a new web lead within a minute. Closes the speed-to-lead loop on inbound forms. See AI outbound calling.
Latency
The delay between a caller speaking and the AI responding. Low latency is what makes an AI voice conversation feel natural rather than stilted; it is one of the most important quality factors in voice AI.
Sales roles & process
SDR (Sales Development Representative)
A rep focused on the top of the funnel: prospecting, cold calling, and booking qualified meetings. SDRs generate pipeline that AEs convert. Learn how to build the function in our SDR training playbook.
BDR (Business Development Representative)
Often used interchangeably with SDR. Where teams distinguish them, BDRs typically focus on outbound prospecting into net-new accounts, while SDRs handle inbound lead qualification.
AE (Account Executive)
A rep who runs the full deal: discovery, demos, negotiation, and closing. AEs take the meetings SDRs book and turn them into revenue. See the top practice scenarios for AEs.
Cold call
An unsolicited outbound call to a prospect who has not expressed prior interest. The core SDR activity; success depends heavily on the first 30 seconds. See the top practice scenarios for SDRs.
Discovery call
A conversation focused on understanding a prospect's problem, impact, and decision process before pitching a solution. Shallow discovery is a leading cause of deals that die late. See how to run discovery calls that surface real pain.
Objection handling
Responding to a prospect's concerns — price, timing, fit, or competition — in a way that keeps the conversation moving. A core skill for both SDRs and AEs. See how to handle price objections.
Gatekeeper
The person — often a receptionist or assistant — who screens calls to a decision-maker. Navigating gatekeepers is a learnable skill that directly lifts SDR connect rates.
Sales metrics & economics
Ramp time
How long it takes a new rep to reach full productivity. Industry averages run 3 to 6 months; slow ramp is a major hidden cost and a driver of turnover. See the real cost of SDR ramp time.
Quota attainment
The percentage of their target a rep achieves. Around 57% of SDRs hit quota overall; first-90-day attainment is a strong predictor of whether a rep stays.
OTE (On-Target Earnings)
A rep's total expected compensation at 100% of quota — base salary plus variable commission. Median SDR OTE sits around $85,000 (roughly $55K base plus $30K variable).
Pipeline
The collection of active opportunities moving toward a close. SDRs are measured largely on the pipeline they generate; a median SDR produces around $3M in pipeline per year.
MQL vs. SQL
A Marketing Qualified Lead (MQL) has shown interest (downloaded content, filled a form) but is not yet sales-ready. A Sales Qualified Lead (SQL) has been vetted and deemed ready for a sales conversation. The hand-off between them is where speed-to-lead matters most.
Sales roleplay
Practicing sales conversations in a simulated setting before live calls. Traditionally done with a manager or peer; the bottleneck has always been the availability of a practice partner.
AI roleplay
Using conversational AI to simulate realistic sales calls — a tireless practice partner that gives a different scenario every time and instant scoring. Removes the practice-volume bottleneck in sales training. See AI roleplay or build a scenario in the free roleplay builder.
Compliance
TCPA
The Telephone Consumer Protection Act — U.S. law governing telemarketing calls, auto-dialers, and prerecorded messages, including consent and calling-window rules relevant to outbound AI calling. See our TCPA compliance guide.
HIPAA
The Health Insurance Portability and Accountability Act — U.S. law governing the privacy and security of protected health information, relevant to any voice AI handling patient calls. See HIPAA AI phone answering.
“Jargon should clarify, not gatekeep. If a vendor cannot explain a term in plain English, that is a signal — about the term and about the vendor.”
