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Cisco IP Telephony Troubleshooting Guide for Cisco CallManager Release 3.0(1)
Known Issues
Cisco CallManager Release 3.0(1) has several known issues with the CDR data. A few of these
are listed here.
IP to Device Name Translation
The CDR table lists IP addresses for the endpoints of a call. These IP addresses are not easily
converted to device names so that the type of device can be determined.
OnNet vs. OffNet
It is difficult to know if the call stayed completely on the IP network, or at least internal to the
local system. One clue is to check the device type of both ends of the call. If both are phones,
then one can assume that it stayed OnNet. If one is a gateway, then more assumptions must be
made. If the gateway is an Analog Access type of device with a POTS or station port, then the
call might have just gone to a local analog phone, or might have gone out to the PSTN. Look at
the number dialed and correlate this to the known dial plan to estimate if the call went OffNet.
Otherwise, the call probably went OffNet.
OffNet Digits Dialed
If a call is placed out a gateway, the digits dialed to get to the gateway may not be the digits sent
to the PSTN. The gateway may be intelligent and modify the directory number further. If this is
the case, Cisco CallManager does not know, and the CDR will not reflect the actual digits sent
OffNet.
Fields in a Call Detail Record
This section defines all fields in the current records. The field types are those used by
Cisco CallManager, and not necessarily those defined in the CDR record in the database. The
database field definitions are adequate to store the data, but the interpretation of the data should
take into account the field types defined here.
All unsigned integers are 32bit unsigned integers.
Field Data Conversions
There are some fields that require conversion from decimal format to another format for
displays. This appendix defines their values, and how to convert them or where to get
information on how to convert them.
Time Values
All time values are represented as unsigned 32 bit integers. This unsigned integer value is
displayed from the database as a signed integer.
This field is a time_t value that is obtained from the Windows NT (2000) system routines. The
value is a coordinated universal time (UTC) value, and represents the number of seconds since
Midnight (00:00:00) Jan. 1, 1970.
© 2000 Cisco Systems, Inc.
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