/**
 * 检查 `value` 是否是座机号码
 *
 * @example
 * ```ts
 * isLandline('13215666')
 * // => false
 * isLandline('0592-5966633')
 * // => true
 * isLandline('0592-5966633-123')
 * // => true
 * ```
 */
export declare function isLandline(value: unknown): value is string;