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Aviz details ASN-DPI SIP and RTP metadata for VoIP

Source Decision Insights Record Published October 1, 2026 Companies 1
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317th article in the last 90 days, one of 845 articles referencing Aviz Networks. Previous coverage: Aviz Networks details Spectrum-X and ONES integration (Oct 2026).

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Architect
Job function
Network / Network Architect
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Network Architect
Buyer role
Architect / Technical Evaluator
Buyer journey
Post Buy
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Early Majority
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Operational Expansion
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Information Technology / Networking / Networking Software & Operations / Network Observability & Performance Monitoring

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ASN-DPI exports SIP and RTP metadata to give enterprises visibility into call setup, media delivery, and voice quality without exposing payloads or using endpoint agents. The vendor says this helps teams troubleshoot VoIP issues such as dropped calls, one-way audio, jitter, and poor clarity.

Research Overview

The blog frames real-time voice traffic as difficult to diagnose because SIP handles call setup while RTP carries media. It says common monitoring tools provide limited protocol context, which makes it harder to isolate the cause of call failures and quality problems.

ASN-DPI is presented as a metadata-based approach that extracts signaling and media details in real time. The post says this allows teams to identify when issues occur and trace why they happen.

Key Findings

The blog says enterprises need visibility into call setup success, codec negotiation, media path symmetry, packet loss, jitter, packet reordering, and the effect of firewall, NAT, and SBC policies on RTP traffic. It presents these as the main elements needed to understand voice quality and signaling failures.

Instead of exporting raw packets, ASN-DPI correlates SIP and RTP metadata while keeping voice content out of the telemetry stream. The post says this provides protocol-level insight without payload exposure.

Technical Breakdown

For SIP sessions, the system exports fields such as call ID, traffic direction, media count, media type, transport protocol, media IP address and port, supported formats, and payload formats. The blog says these fields help confirm codec negotiation and identify configuration issues across network and UC components.

For RTP streams, ASN-DPI exports session identifiers, codec or encoding name, clock rate, channel count, sequence numbers, timestamps, and expected versus actual packet intervals. It also calculates packet loss, jitter, out-of-order packets, and duplicate packets to help identify congestion, WAN instability, QoS settings, or infrastructure faults.

Operational Impact

The blog says SIP and RTP correlation gives teams a full view of the call lifecycle and helps separate signaling problems from media problems. It also describes this as agentless voice quality monitoring across the network.

According to the post, the metadata approach lets enterprises monitor VoIP traffic in real time, troubleshoot call quality, validate firewall, NAT, and SBC behavior, and improve user experience without endpoint agents. The result, as described in the blog, is a shift from reactive troubleshooting to proactive operations.

ASN-DPI is presented as a fact-based summary of the vendor blog, which argues that SIP and RTP metadata can support enterprise VoIP monitoring and troubleshooting without decrypting traffic or deploying agents.

Blog post, originally published at aviznetworks.com.

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