What is a warm transfer vs a cold transfer?

The terms come from switchboards. An operator doing a warm transfer spoke to the colleague first, explained the call, then connected it. A cold transfer skipped the briefing.

Office phone systems call the warm version an attended transfer. A conference introduction is a third variety, where all three people stay on the line and the caller hears the briefing.

The caller's experience is the point of the whole distinction. On a warm transfer they say it once and it sticks. On a cold one, the first question they hear is "How can I help?"

Use warm when the caller is upset or in a hurry. Someone with water coming through the ceiling shouldn't have to describe it twice.

Use warm for a first-time enquiry. The person picking up can open with something specific, like the job, the address or the date they asked about.

Cold is fine for a simple redirect to a department or a named person, where the destination is all the context anyone needs.

Tell the caller what's happening during the handover. A few seconds of silence feels like a dropped call, so a line like "I'm putting you through to dispatch now" keeps them on.

Say you run a heating company and it's 6am in January. A caller tells the assistant her furnace is out, her 84-year-old father lives with her, and the house is at 418 Birch Lane. Your rule sends no-heat calls to dispatch.

Your dispatcher's phone rings, and a text lands at the same moment: "Dana Whitfield, no heat, elderly parent in the home, 418 Birch Lane." She reads it as she picks up. Meanwhile Dana has been told she's being put through to dispatch.

The lines join and your dispatcher opens with, "Hi Dana, I hear the heat's out on Birch Lane and your dad's there with you. I've got a tech twenty minutes away." Dana doesn't repeat a word. On a cold transfer, the same dispatcher would have opened with "How can I help?" and Dana would have started over, a little angrier than before.

Several neighboring terms get mixed up with this one. A blind or cold transfer connects the line and leaves. An attended transfer is the office phone system term for the same idea as warm: the person transferring speaks to the recipient first. A conference introduction keeps all three parties on the line, so the caller hears the briefing, which suits some businesses and feels awkward in others.

Ask any vendor what the caller hears during the handover. Silence feels like a dropped call after about five seconds, so there should be a spoken line or a tone.

Find out what happens when the recipient's voicemail answers. A phone system can't always tell a person from a mailbox, and you don't want your caller's details announced to a recording while she waits.

The last piece is on your side. Staff who receive warm transfers need to use what they were given. Out of habit, plenty of people read the details and still open with "How can I help?", which throws away what the warm transfer gave them. A two-minute conversation with your team fixes it.

GreetKeeper transfers to your team when a caller asks for a person or the reason matches a rule you set. The caller's name, number and reason travel with every transfer, so whoever answers is already briefed.

The on-call person also gets a text with the caller's details, which helps when they're on a job site and pick up mid-task. If they don't answer, GreetKeeper tries a second number you nominate.

Each transfer fires a transfer.made event on GreetKeeper's webhook for your own records. Transfers are included on every plan, from $49 a month for 200 answered calls.