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Cisco IP Telephony Troubleshooting Guide for Cisco CallManager Release 3.0(1)
Glossary of Terms
Following are some common terms and acronyms that may be used in this document.
Glossary
Acronym/Term
.cnf
µ-law ("mu-law")
A-law
ACF
ANI
ARQ
B-Channel
Calling Search Space
CCAPi
CCO
CDR
Cisco IOS
Cluster
CMR
codec
D-Channel
DCF
DHCP
DN
© 2000 Cisco Systems, Inc.
Definition
Configuration file used by devices.
Companding technique commonly used in North America. µ-law is
standardized as a 64-kbps codec in ITU-T G.711.
ITU-T companding standard used in the conversion between analog
and digital signals in PCM systems. A-law is used primarily in European
telephone networks and is similar to the North American µ-law
standard.
Admission Confirm.
The calling number
Admission Request.
Bearer channel. In ISDN, a full-duplex, 64-kbps channel used to send
user data.
The Calling Search Space defines what directory numbers and route
patterns a given device can call. It is a grouping of partitions to look
through when making a call. For example, assume there are several
Partitions in a Calling Search Space named "Executive." If a
Cisco IP Phone number is in the "Executive" Calling Search Space,
then when initiating a call, it looks for the example "NYInternationalCall,"
"NYLongDistance," "NYLocalCall," and "NY911" Partitions available to
search through. A Cisco IP Phone number that has a "Guest" Calling
Search Space, for example, might only be allowed to search through
"NYLocalCall" and "NY911" Partitions, so that if the user tries to dial an
international number, it won't find a match and the call can't be routed.
Call Control API. Used by Cisco IOS to handle VoIP call processing.
Cisco Connection Online (http://www.cisco.com). Provides the latest
information on Cisco products, technical support information, and
technical documentation.
Call Detail Record. Information about call origination, destination, and
duration, used to create billing records.
Cisco system software that provides common functionality, scalability,
and security for all products under the CiscoFusion architecture. Cisco
IOS allows centralized, integrated, and automated installation and
management of internetworks, while ensuring support for a wide variety
of protocols, media, services, and platforms.
Cisco CallManager cluster. A logical grouping of several Cisco
CallManager servers.
Call Management Records, also known as Diagnostic CDRs. Records
that contain the count of bytes sent, packets sent, jitter, latency,
dropped packets, and so on.
Coder-Decoder. A DSP software algorithm used to
compress/decompress speech or audio signals.
Data channel. Full-duplex, 16-kbps (BRI) or 64-kbps (PRI) ISDN
channel. Used for signaling and control.
Disengage Confirm.
Dynamic Host Configuration Protocol. Provides a mechanism for
allocating IP addresses dynamically so that addresses can be reused
when hosts no longer need them.
Directory Number. This is the phone number of an end device. It can be
a number assigned to a Cisco IP Phone, a Cisco IP SoftPhone, fax
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