Specification sheet · Communication APIs (CPaaS)
Fax API & Cloud Fax
Programmable fax that behaves like the rest of your stack - send and receive over REST, T.38 or email, on fax-enabled numbers in 60+ countries, with encryption and retention built for regulated industries.
Send and receive fax via REST API, T.38/G.711 SIP trunks or email-to-fax on fax-enabled numbers in 60+ countries, encrypted at rest with configurable retention policies.
- Countries with fax numbers
- 60+
- And G.711 pass-through
- T.38
- Encryption at rest
- AES-256
At a glance
- REST API to send and receive fax with webhook status callbacks
- T.38 SIP fax trunks with G.711 pass-through fallback
- Fax-to-email, email-to-fax and portal inbox for business users
- Fax-enabled local, national and toll-free numbers in 60+ countries
- PDF, TIFF, DOCX and image rendering with cover pages and headers
- AES-256 encryption at rest, TLS in transit, per-user audit logs
- Retention policies from delete-on-delivery to multi-year archive
- Port existing fax numbers; keep your MFPs and fax servers
Typical use cases
- 01Hospitals, clinics and pharmacies
- 02Law firms and courts
- 03Banks, insurers and brokers
- 04Government and public sector
- 05Logistics, shipping and customs
- 06Enterprise IT retiring fax servers
Technical & commercial specifications
| Interfaces | REST API (JSON), email-to-fax/fax-to-email, portal, T.38 SIP trunk |
|---|---|
| Fax protocols | T.38 (UDPTL) with G.711 pass-through fallback; ECM; up to 33.6 kbps |
| Numbers | Fax-enabled local, national and toll-free in 60+ countries; porting |
| Documents | PDF, TIFF, DOCX, PNG, JPEG; standard and fine resolution |
| Delivery | Webhook, email, SFTP, portal; page-level status and remote CSID |
| Retries | Configurable on busy/no answer; up to 5 attempts by default |
| Security | AES-256 at rest, TLS 1.2+ in transit, RBAC, IP allow-lists, SSO |
| Retention | Delete-on-delivery to 7+ years; legal hold; export to SFTP or S3 |
| Compliance | GDPR, HIPAA-aligned controls, ISO 27001 and SOC 2 practices |
| Support | 24×7 NOC; P1 response ≤ 15 min; named account manager |
Talk to Dollu about Fax API
Send us your destinations, volumes, sites or use case and we will return a proposal, pricing and a technical plan within one business day. Test credentials and the full service description and SLA document are available on request.
- Sales
- [email protected]
- Phone
- +91 777-500-2222
- Web
- dollu.com
- NOC
- [email protected] · 24×7
Dollu Ltd · 2403A, Iconic Corenthum, Sector 62, Noida 201301, India. This sheet summarises the standard service; specifications may vary by country and are confirmed in the service order.
Online version: https://dollu.com/services/cpaas/fax-api
Contact: https://dollu.com/contact?service=fax-api