What are some of the commonly used CLS Codes?

CLS (Class of Service) Codes

Note - most CLS codes can be set for [A]llow or [D]eny by changing the last letter of the code appropriately. E.g. CNDA allows Calling Party Name Display, while CNDD denies display of the Calling Party's Name.

AAD Automatic Answerback Denied
ABDD Abandoned Call Record and time to answer Denied
ADD Automatic Digital Display (default)
AHD Automatic Hold Denied
ARHD Audible Reminder of Held Call Denied
ASCD Alarm Security Denied
AUTU Unrestricted Authorization code Class of Service
BFED Boss Secretary Feature Enhancement Denied
BUZZ Buzz Allowed
CCSD Controlled Class of Service Denied
CDCA Conferee Display Count Allowed
CDMD Denies external station activity records to be generated for the set
CFHD Call Forward Hunt Override Denied
CFTD Call Forward By Call Type Denied
CFXD Call Forward All Calls to external DN Denied
CLBD Calling Party Number and Name per-line Blocking Denied
CLTD Network Call Trace from this telephone Denied
CMSD Command and Status Link Denied
CNDA Call Party Name Display Allowed
CNID Call Number Information Denied
CPFA Forced Camp-On From another set Allowed
CPTA Forced Camp-On To another set Allowed
CRPD Corporate Directory Denied
CTD Conditionally Toll Denied (default)
DAPA Display Access Prefix Allowed
DDGA DN Display on other set Allowed
DDV Data port Verification Denied
DNDA Dialed Name Display Allowed
DPUA DN PickUp Allowed
DRDD Distinctive Ringing by Directory number Denied
DRG1 High fast tone 667Hz/500Hz, warble rate 10.4Hz
DSX Data Service access or IS Server TN Denied
EXR0 Executive Distinctive Ringing Off
FBD Call Forward Busy Denied
FICD Forward Intercom Calls Denied
FITD Flexible Incoming Tones Denied
FLXD Flexible Voice/Data Denied
FND Call Forward No Answer Denied (FNA for non 0-out phones)
FTTC Flexible Trunk-to-Trunk Connections Conditional
GPUD Group Pickup Denied
GRLD Group Listening Denied
HFA Hands Free Allowed
HTA Hunting Allowed
ICDA Internal Call Detail Recording Allowed
IMD Integrated Messaging Service Attendant Denied
IRA Incoming Ringing Line Preference Allowed
LNA Last Number Redial Allowed
LPR Low Priority Station
MCBN Set linked to non MICB line card
MCTD Malicious Call Trace Denied
MRD Message Registration Denied
MSID Make Set Busy Improvement Denied
MTD Maintenance Telephone Denied
MWA Message Waiting Allowed
NAID No Answer Indication Denied
NAMA Name Display on other set Allowed
NID Non-Ringing Incoming Line Preference Denied
OLD Outgoing Line Preference Denied
POD Privacy Override Denied
PUA Call Pickup Allowed
RBDD Redirection By Day Denied
RBHD Redirection By Holiday Denied
RCBD Recall To Boss Denied
RMMD Remote Monitoring of Messages Denied
RTDD Call Redirection by Time of Day Denied
SFD Second level CFNA Denied
SLKD
SMWD Extended Message Waiting Indication Denied
STSD Set-To-Set Messaging Denied
SWD Station-to-station Call Waiting Denied
ULAD Deny access to Set Based Administration
USRD Meridian 911 position denied
VCE Voice Terminal
VMD Server Voice Messaging Denied
WTA Warning Tone Allowed
XHD Exclusive Hold Denied