Webex Calling

Basic Information

Cisco Webex Calling is an enterprise-grade cloud calling solution, forming a core component of the broader Cisco Webex Suite. It functions as a cloud-hosted phone system, replacing traditional on-premises Private Branch Exchange (PBX) infrastructure.

• Model/Version: Webex Calling is a continuously updated cloud service rather than a fixed model or version. For Dedicated Instance deployments, it runs on Cisco Unified Communications Manager (UCM) 15 SU1. The Webex App, which integrates with Webex Calling, receives regular updates.
• Release Date: Webex Communications, Inc. was founded in 1995 and acquired by Cisco Systems in 2007. Cisco Webex Calling was introduced following Cisco's acquisition of BroadSoft in February 2018, integrating BroadSoft's infrastructure into the Webex Cloud.
• Minimum Requirements: Refer to the Technical Requirements section.
• Supported Operating Systems: Refer to the Technical Requirements section.
• Latest Stable Version: As a cloud service, Webex Calling undergoes continuous updates. Specific Webex App versions are released monthly, with users able to receive automatic or custom-scheduled updates.
• End of Support Date: The legacy Hybrid Call Service (Expressway Call Connector architecture) reached End of Support (EoS) on March 31, 2021. Specific operating system versions also have defined end-of-support dates for the Webex App. For example, Webex App support for Android 10 ends in April 2025, and for Android 11 in April 2026. Support for iOS 16, iPadOS 16, visionOS 1.0, and watchOS 9.0 ends in September 2025.
• End of Life Date: The legacy Hybrid Call Service (Expressway Call Connector architecture) reached End of Life (EoL) on June 30, 2021. For the core Webex Calling cloud service, a traditional EoL date is not applicable due to its continuous update model. However, support for the Webex App on specific older operating systems has defined EoL dates, as noted above.
• Auto-update Expiration Date: Webex App updates can be configured for automatic deployment or custom scheduling with deferral periods of up to 4 weeks for the "latest" channel or 12 weeks for the "slow" channel. Connected devices typically update automatically during nightly re-sync windows.
• License Type: Webex Calling offers several license types:
  • Professional License: Designed for individual users requiring full calling capabilities, including support for soft clients and physical devices.
  • Standard License: For individual users needing standard calling features, supporting either a physical device or soft clients, but not both simultaneously.
  • Workspace License: Intended for shared use and common area devices, limited to a single device and not for individual user calling needs.
  • Route List Calls License: An add-on for organizations with on-premises PBX systems (e.g., Cisco CUCM) to use Cloud Connected PSTN.
• Deployment Model: Cisco Webex Calling supports flexible deployment models including cloud-only, on-premises integration (via Cisco Unified Communications Manager), and mixed/hybrid environments. It is available through multi-tenant and Dedicated Instance options, with the latter providing a dedicated cloud instance based on UCM architecture.

Technical Requirements

Cisco Webex Calling, primarily accessed via the Webex App or compatible devices, has varying technical requirements depending on the client and features used.

• RAM:
  • Webex App: Minimum 4 GB recommended.
  • Webex App (Android): Minimum 4 GB, 6 GB recommended.
  • Webex App (Virtual Backgrounds/Reactions): 8 GB or more.
  • Webex Contact Center Desktop: 2 GB overall application RAM (excluding OS allocation).
• Processor:
  • Webex App: Intel Dual-Core CPU 2.XX GHz or AMD processor. Arm64: Qualcomm Snapdragon X Elite/X Plus or Microsoft SQ1 or newer.
  • Webex App (Virtual Backgrounds/Reactions): Intel Core i3, i5, or i7 4000 series or higher; AMD Ryzen 5, 7, 9, or higher. For reactions, Intel Core i5/i7 6000/5000 series dual-core or higher.
• Storage: Not explicitly detailed for the core service, but configurable retention for call recordings implies storage considerations.
• Display: No specific display requirements are listed for the software itself, but compatible devices include various Cisco IP Phones and Webex Boards with integrated displays.
• Ports: Webex Calling utilizes UDP, TCP, and TLS for media streams, and SIP and HTTPS for call signaling. Firewalls must be configured to allow access to required ports for outbound services.
• Operating System:
  • Windows: Windows 10 and later, Windows Server 2016. Windows 11 is also supported.
  • macOS/iOS/iPadOS/visionOS/watchOS: The two latest major releases of iOS and iPadOS are supported. Webex App 45.9 (Sept 2025) is the last version supporting iOS 16, iPadOS 16, visionOS 1.0, and watchOS 9.0. Subsequent versions support iOS 17, iPadOS 17, and newer. macOS 10.13 or later is supported for Webex Meetings.
  • Android: The five latest major releases of Google's Android OS are supported. Webex App 45.4 (April 2025) is the last version supporting Android 10, and 46.4 (April 2026) for Android 11.
  • Linux (Web App): Ubuntu 14.x or later, OpenSuSE 13.x or later, Fedora 18 or later, Red Hat 6 or later, and Debian 8.x or later.
  • Chrome OS: Chrome OS 70 (64-Bit) and later for Webex Contact Center Desktop.
• Internet Connection: A reliable, high-speed internet connection with at least 5 Mbps download and 5 Mbps upload is recommended for optimal performance.

Analysis of Technical Requirements

The technical requirements for Cisco Webex Calling are generally moderate, reflecting its nature as a cloud-based communication and collaboration platform. The Webex App, which serves as the primary user interface, requires modern operating systems and a reasonable amount of RAM and processing power, especially when utilizing advanced features like virtual backgrounds. The continuous update model ensures compatibility with the latest OS versions, but also means older OS versions eventually reach end-of-support. Network connectivity is critical, with a stable high-speed internet connection being paramount for reliable service. The platform's flexibility in supporting various operating systems and devices underscores its adaptability for diverse enterprise environments. The explicit mention of specific processor requirements for advanced features indicates that performance can scale with hardware capabilities. Overall, the requirements are standard for a modern UCaaS solution, emphasizing network stability and up-to-date client software.

Support & Compatibility

Cisco Webex Calling offers broad support and compatibility across various platforms and devices, ensuring a unified communication experience.

• Latest Version: As a cloud-native service, Webex Calling is continuously updated, providing users with the latest features and security enhancements without manual upgrades for the core service. The Webex App receives regular updates, with options for automatic or scheduled deployment.
• OS Support:
  • Desktop: Windows (10, 11, Server 2016+), macOS (two latest major releases, e.g., iOS 17+ from Oct 2025), Linux (Ubuntu, OpenSuSE, Fedora, Red Hat, Debian for Web App).
  • Mobile: Android (five latest major releases, e.g., Android 12+ from April 2026), iOS/iPadOS (two latest major releases, e.g., iOS 17+ from Oct 2025).
  • Web Browsers: Google Chrome, Mozilla Firefox, Apple Safari, Microsoft Edge (latest two major releases).
• End of Support Date: While the core cloud service is continuously supported, specific client software versions on older operating systems have defined end-of-support timelines. For instance, Webex App support for Android 10 ends April 2025, and for iOS 16/iPadOS 16 in September 2025.
• Localization: Webex App and Control Hub are available in numerous languages, including Arabic, Chinese (Simplified/Traditional), Croatian, Czech, Danish, Dutch, English (U.S./UK), French (France/Canada), German, Hebrew, Hungarian, Indonesian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese (Brazil), Romanian, Russian, Serbian, Slovenian, Spanish (Latin America/Spain), Swedish, Turkish, Ukrainian, and Welsh. Voicemail transcription is supported in English, French, German, Italian, and Spanish.
• Available Drivers: Webex Calling primarily relies on operating system and browser compatibility. For optimal performance on Windows, users should ensure graphic drivers (AMD, NVIDIA, Intel) are up to date.
• Compatible Devices:
  • Cisco IP Phones: 6800, 7800, 8800 series Multiplatform Phones (audio and video models).
  • Cisco Desk Phones: 9841, 9851, 9861, 9871.
  • DECT Phones: Cisco IP DECT 6800 Series with Multiplatform Firmware.
  • Wi-Fi Phones: Cisco 840, Cisco 860.
  • Conference Phones: Cisco IP Conference Phone 7832, 8832; Polycom SoundStation IP 5000, 6000.
  • Analog Telephone Adapters (ATAs): ATA191, ATA192, VG400, VG410, VG420.
  • Cisco Webex Room, Board, and Desk Devices: Various models including Webex Desk Pro, Webex Board series, Webex Room series.
  • Third-Party Devices: Supports SIP-compliant devices from manufacturers like Poly and Yealink, provided they meet specific requirements (e.g., TLS 1.2 compliance).

Analysis of Overall Support & Compatibility Status

Cisco Webex Calling demonstrates robust support and broad compatibility, a significant strength for enterprise deployments. Its cloud-native architecture ensures continuous updates and feature enhancements. The extensive list of supported operating systems, including major desktop and mobile platforms, along with popular web browsers, makes it accessible across diverse user environments. The commitment to localization in numerous languages further enhances its global appeal. Compatibility with a wide array of Cisco's own IP phones, desk devices, and collaboration endpoints, alongside support for select third-party SIP devices, offers flexibility for organizations leveraging existing hardware or planning new deployments. The clear communication of end-of-support dates for specific OS versions allows for proactive planning and migration. Overall, Webex Calling provides a comprehensive and adaptable communication solution, minimizing compatibility concerns for most enterprise users.

Security Status

Cisco Webex Calling is designed with security as a foundational element, incorporating multiple layers of protection for communication and data.

• Security Features:
  • Secure by Default: Webex services, including Webex Calling, have secure default settings, eliminating the need for extensive configuration to achieve protection.
  • Data Encryption: Implements encryption for data in transit (using TLS 1.2/1.3 for network communications and SIP signaling, SRTP for media streams) and at rest.
  • Network Security: Utilizes Demilitarized Zones (DMZ), firewalls, and intrusion detection systems.
  • System Authentication: Robust authentication mechanisms are in place for system access.
  • Data Loss Prevention (DLP): Extended DLP retention, Legal Hold, and eDiscovery features are available for meeting content (recordings, transcriptions, etc.).
  • Access Control: Manages access based on "need to know," separation of duties, and role-based access.
  • Multi-Factor Authentication (MFA): Supports MFA, with Cisco Duo being a common option, integrating with various Identity Providers (IdPs) like PingIdentity, Forgerock, Microsoft, or Okta.
  • Secure Development Lifecycle (SDL): Cisco follows a mature SDL process, including security requirements, threat modeling, secure design and coding, static analysis, and vulnerability testing.
  • Vulnerability Management: Has a security assessment program to identify and remediate vulnerabilities, and a dedicated Product Security Incident Response Team (PSIRT) for public disclosure.
  • Audit Logs: Records all user activities, exceptions, and information security events for investigation and access control monitoring.
• Known Vulnerabilities: Cisco publicly discloses and patches security vulnerabilities. In 2020, high-severity flaws were patched in Webex Meetings Desktop App related to unauthorized access, arbitrary code execution, and information disclosure.
• Blacklist Status: No information found indicating a general blacklist status for Cisco Webex Calling.
• Certifications: While not exhaustively listed, Webex Meetings sites can be FedRAMP-compliant. Cisco's security practices generally align with industry standards.
• Encryption Support:
  • Transport Layer Security (TLS): Supports TLS 1.2 and TLS 1.3 for secure SIP signaling and network communications, with strong cipher suites (e.g., TLS_AES_256_GCM_SHA384, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256).
  • Secure Real-Time Transport Protocol (SRTP): Secures media streams using SRTP with ciphers like AES_CM_128_HMAC_SHA1_80 and AES-256-GCM.
  • End-to-End Encryption: User-generated content (messages and files) in Webex spaces is encrypted end-to-end before being sent to the cloud.
• Authentication Methods: Supports system authentication, mutual TLS (mTLS) with signed certificates, and Multi-Factor Authentication (MFA) through integrations with various IdPs and Cisco Duo.
• General Recommendations: Cisco recommends maintaining network security at all levels, including DMZ, firewalls, and intrusion detection. Regular audits and independent reviews ensure the adequacy and enforcement of security processes.

Analysis on the Overall Security Rating

Cisco Webex Calling exhibits a high overall security rating, built upon Cisco's extensive experience in enterprise security. The "secure by default" philosophy, comprehensive data encryption (in transit and at rest), and robust network security measures provide a strong defense against threats. The implementation of MFA, granular access controls, and a rigorous Secure Development Lifecycle underscore a proactive approach to security. While vulnerabilities are inherent in any complex software, Cisco's transparent disclosure and patching process, supported by dedicated security teams, demonstrate a commitment to rapid remediation. The platform's adherence to security best practices and its integration with advanced security features like DLP and eDiscovery position it as a highly secure solution for enterprise communication. Users can generally trust the platform's security posture, especially when combined with proper organizational security policies and user awareness.

Performance & Benchmarks

Cisco Webex Calling focuses on delivering a reliable and high-quality communication experience, leveraging its cloud infrastructure.

• Benchmark Scores: Specific, publicly available benchmark scores for Webex Calling's performance (e.g., latency, jitter, packet loss under stress) are not explicitly detailed in the provided search results.
• Real-world Performance Metrics:
  • Voice Quality: Users consistently report excellent, high, sharp, and clear audio quality, contributing to seamless communication.
  • Reliability: Described as reliable and user-friendly, especially for remote and hybrid teams.
  • Connectivity: Some users report connection issues and app responsiveness problems, particularly when internet connectivity is unstable.
  • Call Connection Speed: Users note that calls connect very quickly.
• Power Consumption: Information regarding the specific power consumption of the Webex Calling service or its impact on client device battery life is not explicitly provided in the search results.
• Carbon Footprint: Cisco mentions its commitment to environmental sustainability, but specific carbon footprint metrics for Webex Calling are not detailed.
• Comparison with Similar Assets:
  • Microsoft Teams: Some users prefer Webex Calling over Microsoft Teams, citing Webex's superior performance for certain features, though Teams is maturing. However, some users find Webex Calling to be more expensive than Microsoft Teams.
  • On-premises PBX: Webex Calling aims to reduce operational costs and improve productivity by migrating critical business communications to the cloud, offering an alternative to managing on-premises PBX systems.

Analysis of the Overall Performance Status

The overall performance of Cisco Webex Calling is generally perceived as strong, particularly in terms of call quality and reliability. User feedback consistently highlights crystal-clear audio and seamless communication, which are critical for business telephony. The cloud-based architecture and continuous updates contribute to its stability and responsiveness. However, like any cloud service, its performance is inherently tied to the quality and stability of the user's internet connection, with reported issues arising from unstable networks. While specific technical benchmarks are not readily available, the positive user experiences regarding voice quality and ease of use suggest a well-optimized platform for its primary function. The comparison with competitors indicates that Webex Calling holds its own, often preferred for its core calling capabilities, despite some perceptions of higher cost. Enterprises considering Webex Calling should prioritize robust network infrastructure to ensure optimal performance.

User Reviews & Feedback

User reviews and feedback for Cisco Webex Calling highlight several strengths and weaknesses, shaping its recommended use cases.

• Strengths:
  • Ease of Use and User-Friendly Interface: Many users appreciate the intuitive interface, making it easy to place, receive, and manage calls.
  • Reliability and Cloud-Based: Praised for its reliability, especially for remote and hybrid teams, due to its cloud-based nature.
  • Seamless Integration: Integrates effortlessly with other Webex tools like Meetings and Messaging, creating a unified collaboration experience.
  • Excellent Call Quality: Consistently high audio quality, described as sharp and clear, is a frequently cited advantage.
  • Centralized Management: Webex Control Hub allows for easy assignment of numbers, call routing, and real-time analytics.
  • Scalability and Security: Noted for its scalability, robust security, and minimal IT administration requirements.
  • Flexible Device Support: Smooth switching between desktop, mobile, and desk phones enhances convenience for hybrid work.
  • Simple Deployment and Reporting: Administrators find deployment straightforward and reporting easy to understand, with data collected automatically.
• Weaknesses:
  • Internet Dependency: Service disruption is a significant drawback without a stable internet connection.
  • Connection Issues: Some users experience connection problems, affecting call making and app responsiveness.
  • Configuration Complexity: Difficult configuration, particularly when syncing and navigating settings, and complex initial setup are reported.
  • Missing Functionality/Limited Granular Control: Users note a lack of granular control and missing functionality, especially regarding third-party integrations and customization options.
  • Cost: Perceived as expensive compared to some other tools like Microsoft Teams.
  • Mobile App Lag: The mobile app can sometimes lag during peak usage times.
  • High Data Usage: High-quality video features can consume significant data.
  • Troubleshooting Limitations: Users may find it difficult to troubleshoot problems independently.
• Recommended Use Cases:
  • Businesses seeking a reliable, cloud-based calling solution for remote and hybrid teams.
  • Organizations prioritizing seamless integration within the broader Webex collaboration ecosystem.
  • SMBs who prefer softphones on computers or mobile devices over traditional hard phones.
  • Enterprises looking for a single, intuitive interface for call management and automated reporting.

Summary

Cisco Webex Calling is a robust, enterprise-grade cloud telephony solution designed to integrate seamlessly within the broader Webex collaboration suite. It offers a comprehensive set of PBX features delivered through a flexible, continuously updated cloud model. Key strengths include its user-friendly interface, high call quality, and strong security posture, which is built-in by default with extensive encryption, multi-factor authentication, and rigorous vulnerability management. The platform supports a wide array of devices and operating systems, ensuring broad compatibility across diverse enterprise environments. Its deployment flexibility, including multi-tenant and dedicated instance