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C9/VoIP

Voice Infrastructure // SIP Trunking

High-Capacity Dedicated SIP Trunking

High-concurrency, low-latency SIP trunks built for heavy inbound and outbound voice traffic—designed for high call completion rates and low post-dial delay.

High Call Completion

Routing engineered to maximize ASR across every termination and origination path.

Low Post-Dial Delay

Direct peering and optimized signaling keep PDD consistently under 500ms.

Instant Provisioning

Trunks live in minutes via the wholesale portal or REST API—no provisioning tickets.

Month-to-Month Terms

No minimum spend, no volume quotas, no long-term lock-in.

Technical Core

Network Technical Specifications

The raw parameters an engineer scans for—codecs, transport, DTMF, and resiliency behavior.

Media & Codecs

Full transcoding flexibility across narrowband and wideband audio.

[CODECS: G.711u/a, G.729, OPUS]
[DTMF: RFC 2833 / SIP INFO]
[FAX: T.38 PASSTHROUGH]

Transport & Security

Encrypted signaling and media across every trunk by default.

[TRANSPORT: UDP, TCP, TLS]
[MEDIA: SRTP]
[AUTH: IP ACL + DIGEST]

Resiliency & Redundancy

Geo-redundant POPs with automated carrier failover and load balancing.

[POPS: 6 GEO-REDUNDANT]
[FAILOVER: AUTOMATED]
[BALANCING: DYNAMIC]

Verified Interop Platforms

VERIFIED::ENGINEERING_LAB
  • Cisco CUBE
  • Ribbon SBC
  • Sansay
  • TelcoBridges
  • Asterisk
  • FreeSWITCH
  • Kamailio
  • OpenSIPS

Scalable Wholesale Voice Without the Carrier Lock-in

Month-to-month flexibility, zero minimum commitments, and direct Level-3 engineering access on every account.