Text Call Detail Records
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Note: In release 2.6 and earlier, the direction of the call is as follows: | Note: In release 2.6 and earlier, the direction of the call is as follows: | ||
- "originate" (incoming call leg) - "answer" (outgoing call leg) | - "originate" (incoming call leg) - "answer" (outgoing call leg) | ||
| + | In release 2.7, the CDR option "Reverse CDR call origin" in Gateway configuration provide the same values as in release 2.6. | ||
*@{OriginalCalledNumber}: Original called number | *@{OriginalCalledNumber}: Original called number | ||
Note: Supported on release 2.7 and up only. | Note: Supported on release 2.7 and up only. | ||
Revision as of 22:11, 9 June 2013
Text call detail records (CDR) can be used on the TMG800, TMG3200 or TMG7800. The Call Detail Records are saved in a log file on a local disk. There is an entry done for each call leg, at the start of a call and at the end of the call. In addition you can configure the system to update the CDRs periodically (update).
The format of the CDR traces is defined by configuration, using variables that are replaced by the Gateway application when writing to the log. For example, the following variable will be replaced by the called number: @{CalledNumber}
In order to save disk space and simplify the archiving and backup of CDR log files, this log file is automatically archived (gzipped) and rotated every N seconds, as specified by the system configuration.
Contents |
Enabling text CDR
Text CDR functionality is enabled through the Toolpack Web Portal:
- Go to the Gateway->Configurations menu.
- Click on Use CDR behavior to enable the CDR behavior
- Expand the CDR Options section
- In CDR Mode, select Text CDR
- Expand the Text CDR parameters section
- Configure the Text CDR parameters the way you want, using the parameters describe below
Configuration parameters
- CDR log file path: Path of the CDR log file, relative to the current working directory of the Gateway application (e.g.[...]/toolpack/setup/12358/[major version]/apps/gateway).
- CDR format (start): Format of the text CDR log written at the time the call is answered (or terminated if it was never answered). This format contains variables automatically replaced (see below).
- CDR format (update): Format of the text CDR log written periodically during call if the CDR option Enable periodic CDR update is used. This format contains variables automatically replaced (see below).
- CDR format (end): Format of the text CDR log written at the time the call is terminated. This format contains variables automatically replaced (see below).
- Rotation delay in seconds: Delay, in seconds, at which the log file is rotated and gzipped. A delay of 3600 seconds will make log file rotate every hour, for example. NOTE: This parameter cannot be larger then 86400 seconds (1 day). A value of 0 will be considered equivalent to the maximum value.
- Max total size of gzipped CDR logs: Maximum total size (in bytes) of all gzipped log file segments on disk. If ever total size exceeds this limit, older gzipped log files will be deleted. A value of 0 will be considered as unlimited size.
Available variables
The following variables exist and can be used to define the CDR log format.
Variables used for identifying call (or call leg) in general
*@{StatusType}: Indicates the type of record ("Start", "Update" or "End").
*@{LegId}: Unique Id for this leg (32 bits value, but may eventually be upgraded to 64 bits value).
*@{OtherLegId}: Id of the other call leg joined with current call leg.
*@{SessionId}: Unique call identifier for two joined and answered call legs, including failed outgoing call attempts (route retry)
Formatted as 4 values of 32 bits, printed as 4 blocks of 8 hexadecimal characters separated by a space
Ex: a939d169 299ffcd0 00000000 00000000
Note: Call Transfer Target legs have separate SessionId. If you need an id to correlate a transferred call
to the original call, use @{OriginalSessionId}.
*@{OriginalSessionId}: Refers to @{SessionId} of the original legs for this call, in case of call transfer.
In fact, Transfer Target leg has a different value for @{SessionId}, but can be linked with the original call
legs through @{OriginalSessionId}.
*@{LinkId}: Same meaning as @{OriginalSessionId}, but presented as a 32 bits integer value.
For all Ids above, please see Known Limitations below for notes about uniqueness of these values.
Timestamps
*@{AlertTime}: Time where the call has started ringing.
Note: Supported on release 2.7 and up only.
*@{ConnectedTime}: Time where the call was answered (and connected with another leg) (in number of seconds since epoch)
*@{ConnectedTime:format}: Same as @{ConnectedTime} but with custom print format (local time zone), using 'strftime' style, with added
support for @m replaced by milliseconds.
Example format: %Y-%m-%d %H:%M:%S.@m -> 2009-09-02 12:16:24.333
*@{ConnectedTimeUtc:format}:Same as @{ConnectedTime:format} but printed in UTC time, rather than local time zone.
*@{CallDuration}: Call duration in seconds (not available in the "start" CDR log)
Note: Supported on release 2.7 and up only.
*@{CallDurationMs}: Call duration in milliseconds (end - connected time) (not available in the "start" CDR log)
Note: Supported on release 2.7 and up only.
*@{EndTime}: Time where the call has started terminating (in number of seconds since epoch).
Note that slightly differs from the @{Timestamp}, since the 'End' CDR trace is printed once the call has
finished terminating,
while @{EndTime} reports the time where the call has started terminating (upon hangup for example).
*@{EndTime:format}: Same as @{EndTime} but with custom print format (local time zone), using 'strftime' style, with added
support for @m replaced by milliseconds.
Example format: %Y-%m-%d %H:%M:%S.@m -> 2009-09-02 12:16:24.333
*@{EndTimeUtc:format}: Same as @{EndTime:format} but printed in UTC time, rather than local time zone.
*@{RingingDuration}: Ringing duration in seconds (connected - start time)
Note: Supported on release 2.7 and up only.
*@{RingingDurationMs}: Ringing duration in milliseconds (connected - start time)
Note: Supported on release 2.7 and up only.
*@{StartTime}: Time where the call was created (in number of seconds since epoch)
*@{StartTime:format}: Same as @{StartTime} but with custom print format (local time zone), using 'strftime' style, with added
support for @m replaced by milliseconds.
Example format: %Y-%m-%d %H:%M:%S.@m -> 2009-09-02 12:16:24.333
*@{StartTimeUtc:format}: Same as @{StartTime:format} but printed in UTC time, rather than local time zone.
*@{Timestamp}: Time where this CDR log entry was written.
Should not be used for billing purposes. Use @{EndTime} for billing @{EndTime} reports the time where
the call has started terminating (hangup), while *@{Timestamp} the time where signaling confirmed the termination.
*@{Timestamp:format}: Same as @{Timestamp} but with custom print format (local time zone), using 'strftime' style, with added
support for @m replaced by milliseconds.
Example format: %Y-%m-%d %H:%M:%S.@m -> 2009-09-02 12:16:24.333
*@{TimestampUtc:format}: Same as @{Timestamp:format} but printed in UTC time, rather than local time zone.
*@{CalledNumber}: Called number
*@{CallingNumber}: Calling number
*@{CallingPresentation}: Calling presentation: "Unspecified", "NotAvailable", "Allowed", "Restricted", "AddressRestricted" or "NameRestricted"
Note: Supported on release 2.7 and up only.
*@{CallType}: Call type ("Telephony" or "VOIP")
*@{IncomingNAP}: Name of the NAP that originated this call (incoming call leg's NAP name).
Note: Supported on release 2.7 and up only.
*@{NAP}: Name of the NAP this call leg is from
*@{OriginatorName}: Direction of the call:
- "answer" (incoming call leg) - "originate" (outgoing call leg)
Note: In release 2.6 and earlier, the direction of the call is as follows:
- "originate" (incoming call leg) - "answer" (outgoing call leg)
In release 2.7, the CDR option "Reverse CDR call origin" in Gateway configuration provide the same values as in release 2.6.
*@{OriginalCalledNumber}: Original called number
Note: Supported on release 2.7 and up only.
*@{Protocol}: Type of protocol used ("SS7", "ISDN", or "SIP")
*@{RedirectingNumber}: Redirecting number
Note: Supported on release 2.7 and up only.
*@{TerminationCause}: Cause of the call termination, printed as an integer value (refering enum TBCMC_CALL_REASON_CODE)
*@{TerminationCauseString}: Cause of the call termination, printed as an string value
*@{TerminationSource}: Identifies the cause of the leg termination:
- "TermInd": Terminating indication has been received on this leg
- "JoinedTermInd": Terminating indication has been received on the leg joined to current leg,
and has been forwarded to current leg
- "App": Call control application has asked to drop the call
- "Engine": Toolpack engine has decided to terminate this call
(generally due to local errors like disconnected TMedia)
*@{UserName}: For SIP calls, name of the user.
*@{ChargeIndicator}: For TDM (SS7 and CAS R2); received charge indicator in Alert message.
*@{Codec}: Codec used for this call ("G711" for example)
*@{LocalMediaInfo}: Protocol type dependent information on the call leg (local information for SIP calls).
For TDM (Telephony) calls (SS7 or ISDN): "trunk_name:timeslot_nb".
For VOIP calls (SIP): "codec@ip:port" (IP and Port locally used for receiving RTP)
*@{LocalMediaIP}: For VOIP calls, RTP IP address locally used for this call leg.
*@{LocalMediaPort}: For VOIP calls, RTP UDP port locally used for this call leg.
*@{RemoteMediaInfo}: Protocol type dependent information on the call leg (remote information SIP calls).
For TDM (Telephony) calls (SS7 or ISDN): "trunk_name:timeslot_nb".
For VOIP calls (SIP): "codec@ip:port" (IP and Port TMedia is sending RTP to)
*@{RemoteMediaIP}: For VOIP calls, RTP IP address of the remote peer for this call leg.
*@{RemoteMediaPort}: For VOIP calls, RTP UDP port of the remote peer for this call leg.
*@{TimeslotNumber}: For TDM (Telephony) calls, timeslot number that this call was using for audio.
*@{TrunkName}: For TDM (Telephony) calls, name of the trunk that this call was using for audio.
*@{ApplicationName}: Name of the application that has written this log ("Gateway")
*@{RouteAttribute:attr}: Replaced by the value of a custom route attribute, for the selected
route. This will apply only to outgoing call legs that were made from routing.
Eligible route attributes are:
Route set name: Use attribute "routeset_name". Ex: @{RouteAttribute:routeset_name}
Custom route attribute column: Use the custom attribute name. Ex: @{RouteAttribute:priority}
Routing script parameters: Use the route attribute name provided by routing script.
Ex: If script provides: route[:my_param]="myval"
Then it's included in CDR with @{RouteAttribute:my_param}]
Deprecated values:
*@{MediaInfo}: Same as @{RemoteMediaInfo}
*@{RemoteIP}: Same as @{RemoteMediaIP}
*@{RemotePort}: Same as @{RemoteMediaPort}
Known limitations
With Toolpack version 2.5 and older, the following values may not be unique due to following limitations:
- @{LegId}
- @{OtherLegId}
- @{SessionId}
- @{CommonSessionId}
- @{LinkId}
In case both gateway and toolpack_engine applications are are restarted at the same time:
- Recently used values may be reused for new call legs (though not twice simultaneously). This is fixed starting with release 2.5.66, which guarantees values are not reused within 49 days
- Active call legs will be re-assigned a different value. It is thus not possible to correlate "start" and "end" traces from one call that was active when applications were restarted. This is fixed starting with release 2.6.0
In both cases, the workaround is to analyze CDR logs, for billing, based only on the information found in the "end" trace (which should have all required information anyways)
Default values
The default values are as follows:
For the CDR that is printed when the call leg is answered:
@{Timestamp:%Y-%m-%d %H:%M:%S.@m%z},BEG,SessionId='@{SessionId}',LegId='@{LegId}',
StartTime='@{StartTime}',ConnectedTime='@{ConnectedTime}',Calling='@{CallingNumber}',
Called='@{CalledNumber}',NAP='@{NAP}',Protocol='@{Protocol}',Direction='@{OrginatorName}'
(Note: the above is a single line!)
For the CDR that is printed throughout the call duration at periodic intervals (if this option is enabled on the CDR behavior):
@{Timestamp:%Y-%m-%d %H:%M:%S.@m%z}: SessionId='@{SessionId}' LegId='@{LegId}'
For the CDR that is printed when the call leg is terminated:
@{Timestamp:%Y-%m-%d %H:%M:%S.@m%z},END,SessionId='@{SessionId}',LegId='@{LegId}',
StartTime='@{StartTime}',ConnectedTime='@{ConnectedTime}', EndTime='@{EndTime}',
FreedTime='@{Timestamp}',TerminationCause='@{TerminationCauseString}',
Calling='@{CallingNumber}',Called='@{CalledNumber}',NAP='@{NAP}',Direction='@{OrginatorName}'
(Note: the above is a single line!)
Examples
For example, one may define a short comma-separated value-based (CSV) CDR log file to minimize disk space requirements:
"@{LegId},@{ConnectedTime},@{EndTime},@{CallingNumber},@{CalledNumber},@{NAP}"
As another example, one may define a XML-based CDR log file:
<cdr_start>
<time timestamp="@{Timestamp}" start_time="@{StartTime}" connect_time="@{ConnectedTime}" end_time="@{EndTime}"/>
<id session_id="@{SessionId}" leg_id="@{LegId}" link_id="@{LinkId}"/>
<number calling="@{CallingNumber}" called="@{CalledNumber}" direction="@{OrginatorName}"/>
<info nap="@{NAP}" protocol="@{Protocol}" called="@{CalledNumber} media="@{MediaInfo}"/>
<termination cause="@{TerminationCauseString}" source="@{TerminationSource}"/>
</cdr_start>
Redundancy
In a TMG7800 configuration, with redundant TMG-Control servers, only the active server writes the CDR logs. Since the active server may change over time, CDR parsing must take into account that CDR logs may be found in files from the two servers.
The analysis of the logs for the purpose of extracting billing information must be done after combining the two logs, from both TMG-Control servers, sorting the entries by timestamp for example. See how to Retrieve Text CDR here.
CDR entry loss due to switchover
In some situations (during HA switchover for example), some CDR entries may be lost.
The following guide lines provide information on how to deal with these corner cases:
How to retrieve CDR
There are 2 ways to retrieve the text CDR manually or automatically. The procedures are described in Retrieve Text CDR.
Notes
- This mode of operation is not recommended for TMG800 or TMG3200 with a flash disk (last shipment January 2011). However, the TMG800 or TMG3200 with SATA or SSD disk option is OK (use command tbproduct: if the command can be executed, the disk is SATA or SSD).
- TelcoBridges does not recommend storing CDR logs via network file systems (NFS or other). We highly recommend writing to a local hard drive and have developed a background script that moves the gzipped log segments for backup or analysis.
