Dollu SIP Trunking review
A security-focused SIP trunking service for complex enterprise voice deployments.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Dollu SIP Trunking connects on-premises and cloud PBXs, Microsoft Teams tenants, and contact-centre platforms to the public telephone network over IP. It is designed for enterprise, carrier, platform, and contact-centre deployments, with coverage in more than 110 countries. The service supports elastic concurrent channels, configurable burst capacity, IP or registration authentication, geographic and toll-free numbers, number porting, and emergency calling with location information where required.
Security and resilience are central to the offering. SIP signaling uses TLS 1.2+ and media supports SRTP encryption, while fraud controls, spend caps, and destination controls help manage misuse and calling costs. Geo-redundant failover across multiple points of presence supports continuity, and near-real-time call-detail records are available through API and SFTP. These capabilities suit organizations connecting distributed voice environments or requiring more control over routing, security, and operational reporting.
Dollu integrates with Microsoft Teams Direct Routing, on-premises and cloud PBXs, SBC platforms, UCaaS environments, and contact-centre platforms. Number porting includes cutover scheduling, which fits planned migrations. Pricing follows a hybrid model: channel or concurrent-call charges are combined with per-second usage, with costs depending on destination, route class, volume, and regulatory cost. Businesses seeking secure, resilient trunking and broad platform compatibility should shortlist Dollu; organizations that require an immediately visible public rate card or a simpler voice setup should compare alternatives.
Dollu SIP Trunking pros and cons
- Where it wins
- Elastic channels with configurable burst capacity
- TLS 1.2+ signaling and SRTP media encryption
- Geo-redundant failover with Teams and PBX integrations
- Where it doesn't
- No public SIP trunk rate card
- Pricing varies by destination, route, volume, and regulation
- Enterprise-focused features may exceed simpler voice requirements
Dollu SIP Trunking fact sheet, pricing and score →
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