Why International Calls Are Different
A call between colleagues in the same building is low-stakes. A call between a client in Tokyo and an agency in Berlin is not. You are navigating language differences, cultural communication norms, potential audio quality issues from transcontinental routing, and the absence of visual cues that help both parties fill in gaps in understanding.
Getting these calls right matters more than people usually acknowledge. A single confused or frustrating call early in a client relationship can set a negative tone that is hard to reverse.
Before the Call: Preparation
Confirm the time zone in writing. Do not just say "11am Tuesday." Say "11am CET (Berlin time), which is 7pm JST (Tokyo time)." Include both time zones explicitly in every calendar invite and meeting confirmation. Time zone mistakes are more common than people admit — they create a terrible first impression when a client waits for a call that never comes.
Send an agenda. For non-native speakers of your language, an agenda allows preparation. Knowing the topics in advance lets them look up relevant terminology, prepare data, and reduce the cognitive load during the call itself.
Test your audio setup. International calls often traverse more network hops than domestic calls, increasing latency and the chance of quality degradation. A scratchy or delayed call is harder to push through in a second language. Do a test call before any important international call to confirm your microphone, headset, and internet connection are all working correctly.
Know the number format. When dialling internationally, use E.164 format: + followed by the country code and full number, no leading zeros. +81 3 XXXX XXXX for Tokyo, not 003 XXXXXX. VoIP services including Voxa expect E.164 format.
During the Call: Pacing and Clarity
Slow down by 20–30%. Most native English speakers speak at 150–180 words per minute in casual conversation. For international calls with non-native speakers, target 110–130 wpm. This is not condescending — it is respectful. Even fluent non-native speakers process speech more slowly, especially over a phone line without visual cues.
Use short sentences. Long, clause-heavy sentences are hard to follow on a call. "We will proceed with option A, which should deliver by Q3, assuming the revised specs are confirmed by next Friday, which I think is the 21st" is a mess. Break it: "We will proceed with option A. Target delivery is Q3. We need the revised specs confirmed by Friday the 21st."
Confirm understanding explicitly. "Does that make sense?" invites a polite yes even when there is confusion. "Can you tell me back what we agreed on the timeline?" gets you actual confirmation.
Use numbers carefully. "A billion" means 10^9 in American English and historically meant 10^12 in many European languages (the milliard/billion distinction). When discussing large figures, write them in the chat or email alongside the call. Similarly, dates: "the third of the fourth" is unambiguous where "3/4" is not (March 4 vs. April 3 depending on convention).
Pause before responding. Transatlantic latency of 150–300 ms means there is a brief delay between when you finish speaking and when the other person hears it. Jumping in too quickly leads to interruptions. Wait an extra beat before speaking to let your words finish propagating.
Technical Protocol
Use wired ethernet for important client calls. The difference in call quality between a wired connection and shared office Wi-Fi during peak hours can be significant.
Dial from a stable environment. Walking down a corridor or sitting in a café with background noise is fine for casual calls. International client calls warrant a quiet room.
Have a backup plan. Before the call, agree on a fallback: "If we get disconnected, I will call back immediately on this number." This avoids the awkward dance where both parties are simultaneously dialling each other after a drop.
Log the call duration. If the call runs long, note it. Your client may be paying attention to your billing later, and being able to reference "our 47-minute call on March 4th" in an invoice or follow-up adds professionalism.
After the Call: Follow-Up
Send a written summary within a few hours of any substantive call. This serves multiple purposes:
- Creates a record of decisions and action items
- Gives non-native speakers a chance to review what was agreed in their own time
- Catches any misunderstandings before they become problems
- Demonstrates professionalism and attention to detail
The summary does not need to be exhaustive. A three-to-five bullet point email covering decisions made, next actions, and responsible parties is enough for most calls.
The Compound Effect
None of these practices are individually transformative. But the client who always has a clear agenda, speaks at a comfortable pace, never has audio issues, sends a summary within the hour, and gets the time zone right every time is qualitatively different from the norm. That reliability compounds into trust over the course of a long relationship.
International clients, navigating language and time zone gaps, appreciate these small signals of professionalism more than most.