Dan,
Thanks for editing. Now it is short and understandable 🙂
Waiting for pause depends on equipment(exchange) which serves your call outside region or country.
If it is digital (modern) — it is not necessary to wait for pause.
If it is analog (old) — you have to wait a little after 0, and after pause you should hear continuous beeeeeeeeeeeep.
Biggest telecom company in Ukraine, Ukrtelecom, says on their website next
1. Outside region and to mobile phones, whithin Ukraine:
0 (wait for continuous beep);
CITY CODE or MOBILE OPERATOR CODE;
PHONE NUMBER.
2. Outside Ukraine:
0 (wait for continuous beep);
0 (prefix for abroad call);
COUNTRY CODE;
CITY CODE;
PHONE NUMBER.
BRGDS,
Andrey Voyevodin
AV-exim
Kiev, Ukraine