Eavesdropping on internal calls exposes companies to the loss of sensitive information, as attackers can intercept communications between employees without authorization. Yeastar PBX systems provide a straightforward solution by enabling call encryption, making communications unreadable except to the intended parties.
In this article, we explore practical methods to achieve this through Yeastar P-Series systems, focusing on the steps and features that ensure complete security for internal calls.
Eavesdropping on Internal Calls
Eavesdropping occurs when voice signals are intercepted during transmission within a company’s internal network. In an internal communication environment, calls between extensions are vulnerable if unprotected, especially in unencrypted local networks. This type of eavesdropping can lead to the theft of business or personal data, such as project discussions or management decisions. Yeastar PBX systems address this challenge through robust encryption protocols that transform data into incomprehensible codes during transmission.
In internal networks, eavesdropping relies on simple tools like packet sniffers, which capture unencrypted data. Without encryption, digital voice becomes easy to analyze, rendering privacy an illusion. Yeastar P-Series PBX systems prevent this by automatically enabling encryption for every internal call, processing signals within the device itself without requiring complex external modifications.
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How Eavesdropping Happens and Basic Defense Mechanisms
Eavesdropping typically begins with network vulnerabilities, such as open ports or unsecured devices. In internal calls, voice travels via the SIP (Session Initiation Protocol) for signaling and RTP (Real-time Transport Protocol) for media, both of which are susceptible to interception if not encrypted. Yeastar PBX systems use TLS to encrypt SIP signaling, protecting against data manipulation during call setup, and SRTP to encrypt RTP media, which covers the actual voice.
For defense, focus on multiple layers:
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Securing the internal network with firewalls.
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Enabling encryption at the extension level.
Yeastar PBX systems make this process seamless, allowing encryption configuration through a simple web interface. For example, in an internal call between extensions 101 and 102, the signaling is immediately encrypted with TLS, and the media is encrypted with SRTP, rendering any eavesdropping attempt useless as it reveals only encrypted, unusable data.
Importance of Protecting Internal Calls in the Workplace
Internal calls form the backbone of communication in companies, whether for coordinating between departments or exchanging sensitive information. Any leak can impact internal trust and external competitiveness. Yeastar PBX systems ensure secure business continuity, particularly for medium-sized companies relying on VoIP communications. By enabling encryption, Yeastar PBX systems reduce the risks of unauthorized access, maintaining uninterrupted workflow.
In a business context, encryption aids compliance with essential security standards, making the system resistant to common attacks like Man-in-the-Middle. Yeastar P-Series PBX systems integrate this protection as a core part of their design, making them an ideal choice for companies seeking a balance between performance and security.
Encryption Features in Yeastar PBX Systems: SRTP and TLS
SRTP (Secure Real-time Transport Protocol) encrypts the voice media in internal calls, preventing clear audio capture. It is automatically enabled when configuring extensions, using robust encryption algorithms like AES-128 to convert data into secure codes. This renders any eavesdropping attempt as garbled, unusable audio.
TLS (Transport Layer Security) protects SIP signaling, which serves as the bridge between extensions. TLS supports versions 1.2 and 1.3, ensuring secure key exchange before the call begins. The combination of SRTP and TLS creates a dual-layer protection: TLS encrypts the setup, and SRTP encrypts the content. This approach safeguards internal calls from eavesdropping within the local network, even if the network includes untrusted devices.
Yeastar PBX Models Suitable for Protecting Internal Calls
Yeastar P-Series PBX models vary to meet the needs of different businesses, with full encryption support. Here’s an overview of the key models:
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P520: Ideal for small businesses, supporting 20 basic users with 10 concurrent calls. It includes 4 FXS ports for analog phones, 4 FXO ports for external lines, and one 3G/4G port. SRTP and TLS encryption are integrated, protecting internal calls in resource-limited environments.
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P550: Suitable for medium-sized teams, supporting 50 basic users and 25 concurrent calls. It offers 8 FXS ports, 8 FXO ports, 4 3G/4G ports, and expandability to 100 users.
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P560: Designed for growing businesses, supporting 100 basic users (expandable to 200) with 30 concurrent calls (up to 60). It includes 8 FXS ports, 8 FXO ports, 4 3G/4G ports, and one E1/T1/J1 port. Encryption is advanced in this model, with support for custom TLS certificates, enhancing protection against eavesdropping in large networks.
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P570: The most powerful model for large enterprises, supporting 300 basic users (up to 500) and 60 concurrent calls (up to 120). It includes 16 FXS ports, 16 FXO ports, 6 3G/4G ports, and two E1/T1/J1 ports. The P570 supports bulk encryption for internal calls, with additional features like IP blocklists to prevent unauthorized access.
Benefits of Enabling Encryption with Yeastar PBX Systems
By enabling encryption, companies achieve complete privacy for internal calls, reducing the risk of leaks. Yeastar P-Series PBX systems maintain high-quality HD voice even with encryption, thanks to efficient algorithms. They also support secure remote access via the Linkus Client, extending encryption to external calls when needed.
Additionally, encryption reduces maintenance burdens, as the system handles automatic key updates. In models like the P560, encryption levels can be customized for specific departments, offering flexibility for large organizations.
Start Protecting Your Communications Today
Enabling call encryption through Yeastar PBX systems is the first step toward a fully secure internal network. With the versatile P-Series models, any company can implement this solution efficiently. For consultation or installation, contact Modn Telecom, Yeastar’s authorized partner, to ensure your internal calls are protected from eavesdropping forever.
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