user has requested a supplementary service which is implemented by the equipment which generated this cause but the user is not authorized to use.What it means:The switch looks at the number being dialed and thinks it is for another service rather than ISDN. If the phone number is put in the correct format, the call should be placed properly. There are no standards for this, all Telcos have their own system for programming the number formats that the switches will recognize. Some systems want to see 7 digits, some 10, and others 11.Cause No. 52 - outgoing calls barred.Cause No. 53 - outgoing calls barred within CUG.This cause indicates that although the calling party is a member of the CUG for the outgoing CUG call. Outgoing calls are not allowed for this member of the CUG.Cause No. 54 - incoming calls barred Cause No. 55 - incoming calls barred within CUG.This cause indicates that although the calling party is a member of the CUG for the incoming CUG call. Incoming calls are not allowed for this member of the CUG.Cause No. 57 - bearer capability not authorized.This cause indicates that the user has requested a bearer capability which is implemented by the equipment which generated this cause but the user is not authorized to use.Cause No. 58 - bearer capability not presently available.This cause indicates that the user has requested a bearer capability which is implemented by the equipment which generated this cause but which is not available at this time.Cause No. 62 - inconsistency in outgoing information element.This cause indicates an inconsistency in the designated outgoing access information and subscriber class.Cause No. 63 - service or option not available. unspecified.This cause is used to report a service or option not available event only when no other cause in the service or option not available class applies.Cause No. 65 - bearer capability not implemented.This cause indicates that the equipment sending this cause does not support the bearer capability requested.What it means:In most cases, the number being called is not an ISDN number but an analog destination.The equipment is dialing at a faster rate than the circuitry allows, for example, dialing at 64K when only 56K is supported.Cause No. 66 - channel type not implemented.This cause indicates that the equipment sending this cause does not support the channel type requested.Cause No. 69 - requested facility not implemented.This cause indicates that the equipment sending this cause does not support the requested supplementary services.Cause No. 70 - only restricted digital information bearer capability is available.This cause indicates that the calling party has requested an unrestricted bearer service but the equipment sending this cause only supports the restricted version of the requested bearer capability.Cause No. 79 - service or option not implemented unspecified.This cause is used to report a service or option not implemented event only when no other cause in the service or option not implemented class applies.Cause No. 81 - invalid call reference value.This cause indicates that the equipment sending this cause has received a message with a call reference which is not currently