API : PBX : CDR quality

Introduction

Returns the full per-leg audio quality analysis of a single call. This backs the per-call view in the portal, where support can see which party had the problem and in which direction.

Scope, verdicts, finding codes and thresholds are described on Call audio quality.

Request

URL	https://api.telecomx.dk/pbx/cdr/CDR-ID/quality
Method	GET
Access level	ADMIN, or RESELLER_ADMIN with the TELE employee feature. TX staff only - see Call audio quality.
Param	CDR-ID	Id	Id of the CDR to analyse (24 hex-char string).

Query example

https://api.telecomx.dk/pbx/cdr/5d035c832d357b369b6f7aff/quality

Response

JSON object
cdrId	String	Id of the CDR that was analysed.
verdict	String	Worst verdict across the calls legs.
measured	Boolean	True when at least one leg could be judged.
severity	Number	Numeric rank of `verdict`, for sorting only.
reason	String	Why nothing could be judged, when `measured` is false. Null otherwise.
worst	Object	The single worst finding, for a one-line summary. Null when there is nothing to report.
legs	Array	One entry per RTP leg. Empty when the call has no usable stats.
findings	Array	Leg findings plus the call-level cross-checks, worst first.

worst object
code	String	Code of the worst finding.
role	String	`caller` or `callee`.
party	Object	The party it concerns, so a list row can name the phone rather than the role.
direction	String	`INBOUND` or `OUTBOUND`.
percentMissing	Number	Percentage of that partys audio that never reached us, when the finding is delivery- or loss-related.

legs[] object
channelId	String	Asterisk channel id. Correlates with syslog and packet captures - technical panel only.
role	String	`caller` (the party who started the call) or `callee` (a party who was called).
party	Object	How to name this party: `kind`, `name`, `number`, `model`, `raw`. Identity comes from the CDRs caller/callee - see Call audio quality.
source	String	`live` if the counters were read as the call ended, `sampled` if this is the newest mid-call sample.
mediaSeconds	Number	Seconds of media the counters cover, from when this leg was answered.
verdict	String	Worst of this legs directions.
measured	Boolean	True when at least one direction of this leg could be judged.
reason	String	Why nothing on this leg could be judged, when `measured` is false.
inbound	Object	Their microphone reaching us (see below). Always locally measured, so always meaningful.
outbound	Object	What we sent to their speaker (see below). Needs RTCP from the far end to say anything at all.
rtt	Number	Round-trip time in seconds, when the far end reported usable RTCP timestamps. Null otherwise.
rttVerdict	String	Verdict for the round-trip time, NOT_MEASURED when no usable RTT was reported.
findings	Array	Findings for this leg.

inbound / outbound object
measured	Boolean	True when this direction could be judged. False means unknown, not OK.
reason	String	Why it could not be judged, when `measured` is false.
verdict	String	Verdict for this direction alone.
pps	Number	Packets per second actually observed. Display only.
referencePps	Number	Packets per second of this legs own outbound stream. Inbound only - the reference the delivery ratio is measured against, never a quality signal in itself.
deliveryRatio	Number	Inbound packets divided by this legs own outbound packets. About 1.0 is healthy, about 0.5 is every second frame, 0 is dead.
lossRatio	Number	Fraction of packets lost.
jitter	Number	Jitter in seconds.
mes	Number	Media Experience Score, 0-100, higher is better.

findings[] object
code	String	Machine-readable finding code.
verdict	String	How serious this observation is.
channelId	String	Which leg it concerns. Null for call-level findings.
role	String	Role of that leg. Null for call-level findings.
direction	String	`INBOUND` or `OUTBOUND`. Null when not direction-specific.
values	Object	The measured values behind the finding, so the caller can phrase it in the users language.

Example

{
  "cdrId": "5d035c832d357b369b6f7aff",
  "verdict": "DEGRADED",
  "measured": true,
  "severity": 2,
  "reason": null,
  "worst": {
    "code": "INBOUND_DELIVERY_LOW",
    "role": "caller",
    "party": { "kind": "SIP_PHONE", "model": "Mitel-6867i", "raw": "SIPPHONE/Mitel-6867i" },
    "direction": "INBOUND",
    "percentMissing": 16
  },
  "legs": [
    {
      "channelId": "1787253742.97114",
      "role": "caller",
      "party": { "kind": "SIP_PHONE", "name": null, "number": null, "model": "Mitel-6867i", "raw": "SIPPHONE/Mitel-6867i" },
      "source": "sampled",
      "mediaSeconds": 183,
      "verdict": "DEGRADED",
      "measured": true,
      "reason": null,
      "inbound": {
        "measured": true,
        "reason": null,
        "verdict": "DEGRADED",
        "pps": 41.2,
        "referencePps": 49.1,
        "deliveryRatio": 0.84,
        "lossRatio": 0.021,
        "jitter": 0.031,
        "mes": 74.2
      },
      "outbound": {
        "measured": false,
        "reason": "NO_RTCP_FROM_FAR_END",
        "verdict": "NOT_MEASURED",
        "pps": 49.1
      },
      "rtt": null,
      "rttVerdict": "NOT_MEASURED",
      "findings": [ ... ]
    },
    {
      "channelId": "1787253742.97115",
      "role": "callee",
      "party": { "kind": "EXTENSION", "name": "Reception", "number": "1234", "raw": "5f2b1c9e4a7d3b8e6c1a0d92" },
      "source": "live",
      "mediaSeconds": 183,
      "verdict": "OK",
      "measured": true,
      "inbound": { "measured": true, "verdict": "OK", "pps": 50, "referencePps": 50, "deliveryRatio": 1, "lossRatio": 0, "jitter": 0.001, "mes": 88 },
      "outbound": { "measured": false, "reason": "NO_RTCP_FROM_FAR_END", "verdict": "NOT_MEASURED", "pps": 50 },
      "rtt": null,
      "rttVerdict": "NOT_MEASURED",
      "findings": []
    }
  ],
  "findings": [
    {
      "code": "INBOUND_DELIVERY_LOW",
      "verdict": "DEGRADED",
      "channelId": "1787253742.97114",
      "role": "caller",
      "direction": "INBOUND",
      "values": { "deliveryRatio": 0.84, "percentMissing": 16, "pps": 41.2, "referencePps": 49.1 }
    }
  ]
}

Unmeasured calls

A call that was never answered by the callee, that predates the rtpStats rollout, or that consists only of Local/ legs comes back with measured: false, a reason, and no OK anywhere:

{
  "cdrId": "5d035c832d357b369b6f7aff",
  "verdict": "NOT_MEASURED",
  "measured": false,
  "severity": 0,
  "reason": "CALL_NOT_ANSWERED",
  "worst": null,
  "legs": [],
  "findings": []
}

reason	Meaning
CALL_NOT_ANSWERED	The call was never answered by the callee.
NO_RTP_LEGS	No RTP leg was recorded - `Local/` channels and SYSTEM calls have no RTP session.
PRE_ROLLOUT_CDR	The CDR predates the rtpStats rollout and carries the old flat fields, which cannot be trusted to a direction.
LEG_TOO_SHORT	Every leg carried less than 10 seconds of media.
NO_MEDIA_TIME	The legs answer time was not known, so no rate can be derived.
NO_RTCP_FROM_FAR_END	Direction level only: the far end sends no RTCP receiver reports.

Errors

Error code	Message	Description
401	unauthorized	Missing or invalid token
403	access_denied	Not TX staff, or the call belongs to a customer the user may not read
404	id	Call not found
500	internal_error	<Unspecified>

WIKI

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