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Asterisk – это свободное программное обеспечение с открытым кодом (Open Source) для протоколов VoIP-телефонии («Voice over IP»). Приложение работает на операционных системах семейства UNIX (FreeBSD и Solaris, например), Linux (RedHat и Debian ), и даёт множество возможностей для качественной связи нового поколения.

Основное преимущество Asterisk в существенном снижении затрат. Если упростить, то для того, чтобы между различными офисами была постоянная связь, нужно множество телефонных линий, а также специализированная техника – мини-АТС, кросс-панели, телефонные аппараты. Стоимость техобслуживания всех этих устройств в сумме, стоимость городских и междугородних телефонных звонков, первоначальная закупка техники – львиной доли этих расходов можно избежать, используя Asterisk.

Первоначальная закупка оборудования для VoIP – сервера и специализированных цифро-аналоговых преобразователей, а также оплата работы специалиста по системному администрированию, который настроит этот сервер для Asterisk, также обойдётся совсем недёшево. Кроме того, обязательно наличие и оплата высокоскоростного интернета. Но все эти расходы окупятся позже, когда отпадёт необходимость оплачивать телефонные звонки и обслуживать аналоговые линии связи.

Кроме того, VoIP работает по принципу «настроил и забыл». Для добавления абонента в сеть VoIP достаточно подключить к сети его персональный компьютер, сделав несколько манипуляций на сервере, а для подключения аналогового абонента понадобится несколько метров нового кабеля и несколько часов оплачиваемой работы специалиста.

Ну и самое простое - VoIP обеспечивает более качественную связь. Обилие соединений проводов аналоговой связи приводит к появлению помех и шумов. Это происходит по многим причинам: окисления на контактных площадках, в разъёмах, реле и в скрутках проводов. А с цифровой связью работа автоматически переходит на более высокий качественный уровень.

Asterisk поддерживает большинство протоколов VoIP и может работать и с аналоговыми линиями.

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