If you don't hear a dial tone, your organization or telephone might not support this type of outside call, or might require an additional access code.
如果未听到拨号音,表明您所在单位或您的电话可能不支持这种对外呼叫类型,或需要额外的访问号码。
If you don't hear a dial tone, your organization or telephone might not support this type of outside call, or might require an additional access code.
如果未听到拨号音,表明您所在单位或您的电话可能不支持这种对外呼叫类型,或需要额外的访问号码。
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