Cause Code Values

000

Reserved

053

Outgoing Calls Barred Within CUG

001

Unallocated

054

Unknown Cause Code

002

No Route to Specified Transit Network

055

Incoming Calls Barred Within CUG

003

No Route to Destination

056

Unknown Cause Code

004

Send Special Information Tone

057

Bearer Capability Not Authorized

005

Misdialed Trunk Prefix

058

Bearer Capability Not Available

006

Channel Unacceptable

059 - 061

Unknown Cause Code

007

Call Awarded

062

Inconsistency b/w access info and sub class

008

Preemption

063

Service of Option Not Available, unspecified

009

Preemption - Circuit Reserved for Reuse

064

Unknown Cause Code

010 - 015

Unknown Cause Code

065

Bearer Capability Not Implemented

016

Normal Call Clearing

066

Channel Type Not Implemented

017

User Busy

067

Unknown Cause Code

018

No User Responding

068

Unknown Cause Code

019

No Answer from User

069

Requested Facility Not Implemented

020

Subscriber absent

070

Restricted Digital Info Bearer Only

021

Call Rejected

071 - 078

Unknown Cause Code

022

Number Changed

079

Service or Option Not Implemented, unspecified

023

Unknown Cause Code

080

Unknown Cause Code

024

Unknown Cause Code

081

Invalid Call Reference Value

025

Exchange Routing Error

082

Identified Channel Does Not Exist

026

Non-Selected User Clearing

083

Call Identity Does Not Exist

027

Destination Out of Order

084

Call Identity In Use

028

Invalid Number Format

085

No Call Suspended

029

Facility Rejected

086

Call Identity Has Been Cleared

030

Response to STATUS ENQUIRY

087

User Not Member of CUG

031

Normal, Unspecified

088

Incompatible Destination

032

Unknown Cause Code

089

Unknown Cause Code

033

Unknown Cause Code

090

Non-existent CUG

034

No Circuit/Channel Available

091

Invalid Transit network Selection

035 - 037

Unknown Cause Code

092

Unknown Cause Code

038

Network Out of Order

093

Unknown Cause Code

039

Frame Mode Connection Out of Service

094

Unknown Cause Code

040

Frame Mode Connection Operational

095

Invalid Message, unspecified

041

Temporary Failure

096

Mandatory Information Element Missing

042

Switching Equipment Congestion

097

Message Type Non-existent or Not Implemented

043

Access Information Discarded

098

Message Not Compatible with Call State

044

Requested Circuit/Channel Unavailable

099

Information Element/Parameter Non-existent

045

Unknown Cause Code

100

Invalid Information Element Contents

046

Precedence Call Blocked

101

Message Not Compatible with Call State

047

Resource Unavailable, unspecified

102

Recovery on Timer Expired

048

Unknown Cause Code

103

Parameter Non-existent or Not Implemented

049

Quality of Service Unavailable

104 - 109

Unknown Cause Code

050

Requested Facility Not Subscribed

110

Message with Unrecognized Parameter

051

Unknown Cause Code

111

Protocol Error, unspecified

052

Unknown Cause Code

112 - 254

Unknown Cause Code 

400

Bad Request

482

Loop Detected

401

Unauthorized

483

Too Many Hops

402

Payment Required

484

Address Incomplete

403

Forbidden

485

Ambiguous

404

Not Found

486

Busy Here

405

Method Not Allowed

487

Request Terminated

406

Not Acceptable

488

Not Acceptable Here

407

Proxy Authentication Required

489

Bad Event

408

Request Timeout

491

Request Pending

410

Gone

493

Undecipherable

412

Conditional Request Failed

494

Security Agreement Required

413

Request Entity Too Large

500

Server Internal Error

414

Request-URI Too Long

501

Not Implemented

415

Unsupported Media Type

502

Bad Gateway

416

Unsupported URI Scheme

503

Service Unavailable

417

Unknown Resource-Priority

504

Server Time -out

420

Bad Extension

505

Version Not Supported

421

Extension Required

513

Message Too Large

422

Session Interval Too Small

600

Precondition Failure

423

Interval Too Brief

603

Busy Everywhere

429

Provide Referrer Identity

604

Does Not Exist Anywhere

480

Temporarily Unavailable

606

Not Acceptable

481

Call/Transaction Does Not Exist