Ensure compatibility with existing systems such as MS Teams, guaranteeing communication stability and data security.

Core Function Solutions
1. Implementation of Centrex Service Scenario
Logical Grouping: Divide each branch into independent Centrex groups (e.g., Branch A Group No. 8012, Branch B Group No. 8013) with a unified extension number range of 7000-7099 within each group.
Simplified Dialing: Extension-to-extension dialing within groups, 8-digit dialing (group number + extension number) across groups, and 4-digit dialing (1000-5100) from branches to the headquarters.
Centralized Control: The headquarters centrally configures call permissions (5-level control), voice navigation, and billing rules, while branches independently manage local users and communication rules.
2. Full-Scenario Communication Interconnection
Internal Communication: Voice/video interconnection within branches and across Centrex groups, supporting 21 core functions including call transfer, hold, forwarding, pickup, and conference calls.
Cross-System Interconnection: Two-way voice/video calls between NewLync 2.0 extensions and existing PBX/MS Teams, ensuring barrier-free basic communication.
External Communication: Local calls access via branch SBC + ITSP; long-distance/international calls route through the headquarters IP-PBX. Automatic switch to backup links when local lines fail.
3. Integrated Management System
Billing Management (NL-Billing): Collect and store CDR data, supporting rate setting, automatic invoicing, report query/printing, and integration with the existing MyCall system.
Call Recording Management (NL-Recording): Full-call recording, supporting query, playback, download, and periodic backup by caller/callee/time period.
Address Book Management (NL-Adbook): Push address books to IP phones, supporting organizational structure maintenance and executive privacy protection.

4. High Availability and Security Assurance
Redundant Backup: When communication between branches and the headquarters is interrupted, branches independently handle all calls via local SBC to ensure uninterrupted communication.
Permission Control: 5-level outgoing call permission control to restrict the call scope of users at different levels, meeting bank compliance requirements.
Stable Operation: Industrial-grade hardware + high-availability software architecture, supporting 7x24 continuous operation with a call completion rate of ≥99.9%.