Call Data Record Download
Libby Ellwein
A call detail record (CDR) is a data record produced by a telephone exchange or other telecommunications equipment that documents the details of a telephone call or other telecommunications transactions (e.g., text message) that passes through that facility or device. The record contains various attributes of the call, such as time, duration, completion status, source number, and destination number.[1][2][3] It is the automated equivalent of the paper toll tickets that were written and timed by operators for long-distance calls in a manual telephone exchange.
A call detail record contains data fields that describe a specific instance of a telecommunication transaction, but does not include the content of that transaction. By way of simplistic example, a call detail record describing a particular phone call might include the phone numbers of both the calling and receiving parties, the start time, and duration of that call. In actual modern practice, call detail records are much more detailed, and contain attributes such as:[2][3]
Call detail records serve a variety of functions. For telephone service providers, they are critical to the production of revenue, in that they provide the basis for the generation of telephone bills. For law enforcement, call detail records provide a wealth of information that can help to identify suspects, in that they can reveal details as to an individual's relationships with associates, communication and behavior patterns, and even location data that can establish the whereabouts of an individual during the entirety of the call. For companies with PBX telephone systems, call detail records provide a means of tracking long-distance access, can monitor telephone usage by department or office, and can create listing of incoming and outgoing calls.
The U.S. Supreme Court has held the records of numbers called are not protected by the Fourth Amendment to the Constitution of the United States because the caller "voluntarily conveyed numerical information to the telephone company."[5] But there is limited protection under the Electronic Communications Privacy Act. The revelation that call metadata records are being universally collected and stored in the U.S. and elsewhere has generated considerable controversy.
"IT IS HEREBY ORDERED that, the Custodian of Records shall produce to the National Security Agency (NSA) upon service of this Order, and continue production on an ongoing daily basis thereafter for the duration of this Order, unless ordered by the Court, an electronic copy of the following tangible things: all call detail records or "telephony metadata" created by Verizon for communications (i) between the United States and abroad; or (ii) wholly within the United States, including local telephone calls...."Telephony metadata includes comprehensive communications routing information, including but not limited to session identifying information (e.g., originating and terminating telephone number, International Mobile Subscriber Identity (IMSI) number, International Mobile station Equipment Identity (IMEI) number, etc.), trunk identifier, telephone calling card numbers, and time and duration of call. Telephony metadata does not include the substantive content of any communication, as defined by 18 U.S.C. 2510(8), or the name, address, or financial information of a subscriber or customer."[6]
A call detail record (CDR) provides information about calls made over a phone service. Here are some frequently asked questions to help you understand how CDRs can be helpful for a variety of purposes.
In the telecom industry, CDR refers to a call detail record, which provides information about calls made through a phone service. A CDR report can offer businesses call data about where, when, and how calls are made for reporting and billing purposes.
CDRs can also include SMS messaging metadata and any other official communications transmission. However, the contents of the messages/calls are not revealed through the CDR. The call detail record simply shows that the calls or messages took place, and measures basic call properties.
A CDR log lists every billable communications transmission on your phone system. This allows phone companies to generate your phone bills, and lets you keep definitive records of how and when your phone system was used. They are primarily used by businesses to assist in call reporting and billing.
Billing departments use CDRs to resolve disputes, keep records of how funding is spent, and log usage of the telephone system. IT departments can also use CDRs to determine if there were any disruptions in phone service.
A CDR report typically shows data broken down either by user or by phone number. A CDR report generated for a single user can show specific metrics, such as call volume and minutes, for that person. A CDR for a phone number gives more of a bird's-eye view of how your phone system is used on a business-wide level.
Generating CDR reports for individual employees is useful to find out who's on the phone the longest, what the call durations are, and how much money each employee spends per call. This can lead to better management of your employees and save resources for your business.
A CDR report for a particular phone number, on the other hand, can indicate how much money specific offices or groups are spending on calling minutes. This is useful if your business has several phone numbers for different locations or departments. This kind of report allows you to take an aggregate look at your company's calling activities.
These calls are not listed on the CDR, because they're not billed. However, calls made to landlines, mobile phones, and international numbers are always logged, because they're charged on a per-minute basis.
Call detail records provide you with detailed logs about your phone activity. You can use the data to verify billing disputes, monitor employee phone activity, and keep track of when, where, and how your phone system is used.
If you're looking for deeper insights into your calling activity, you may want to consider call center reporting features. For example, OnSIP's Enhanced Queues feature comes with a real-time dashboard of your different calling queues and custom reporting.
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The telecommunication industries often face challenges in analyzing customer behavior from the large volumes of call records that are in the database over a period of time. Analyzing call records for failures, voice quality and proper signaling from a huge database is computationally intensive task and requires specialized call processing tools.
This application monitors hundreds of call in real-time, captures bidirectional channel data and records it into PCM signal files, including logging of detailed analysis of selected voice band streams into *.csv files. Capture may be triggered according to various protocols such as signaling bits, ISDN, SS7, CAS, SIP, MLPPP etc. CCA also records signaling and alarm events, as well as producing a summary record for each call. The files containing the event and call summary records are collectively referred to as Call Record Files.
Each CCA instance can monitor a single T1 or E1 trunk. Multiple CCA instances may be run concurrently to monitor multiple trunks. Here, CCA is discussed mainly in the context of Call Data Records generation. The CCA allows to log capture events in CSV or binary files and to feed these results into Call Data Records (CDR) application to provide an overall summary of the call as well as the event-by-event account of each call.
This application operates in near-real-time, processing the signal files recorded by CCA. VBA may be configured to detect in-band events such as sporadic echo, digit tones, in-band impairments, and the like. It also produces summary measurements of the captured signals, including active speech levels, noise level, percent time active, DC offset and the like. VBA records its output into two files, the first containing overall channel measurements, and the second containing event records.
The CDR output in CSV format provides 4 different files for call summary, call side information, call events, and In-band summary. The name of the call summary records file will be the name you specified on the configuration screen followed by "_m.csv" where "_m" indicates call master records, "_s.csv", where the "_s" indicates call side records "_e.csv", where "_e" indicates event and "_v.csv", where the "_v" indicates voiceband statistics.
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Monitoring and measuring critical VoIP call quality components is simple with the right CDR analysis tools. With SolarWinds VoIP and Network Quality Manager (VNQM), you can monitor the call performance metrics found within the call detail record of every VoIP call. With intuitive analytics, you can keep track of VoIP network health and maintain voice quality efficiencies. You can also correlate actual call performance metrics with corresponding IP SLA operations to troubleshoot poor call quality and WAN performance.
Quality VoIP calls require an IP network that can deliver voice packets within the minimum requirements around jitter, packet loss, and latency. SolarWinds VNQM allows you to report on call detail records to identify low-performance VoIP metrics, find other calls affected, and identify potential patterns on Cisco VoIP networks. In-depth VoIP call metrics in VNQM allow you to view call path details, call signaling, and find the root cause of the issue.
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