Lucent Technologies 555-230-220 manual Protocol Error NAK Causes

ASAI and Call Control

■Mandatory Information Element missing (CS0/96) The party_id is missing in the request.

■User busy (CS0/17)

The user is busy (active) on another call.

■User not responding (CS0/18)

The party was on-hook when the request was made and it did not go off-hook within five seconds (call remains on hold).

■Resources not available (CS3/43)

The call cannot be reconnected due to too many parties already on the call or other ECS-specific resource problems.

Protocol Error (NAK) Causes

The ECS issues the following cause for generating a protocol processing error:

■Protocol error (CS0/111)

The Q.932 protocol has been violated or the capability invoked is not consistent with this association. For example, invoking the Third Party Make Call capability on a Domain Control association is inconsistent.

NOTE:

For more information regarding protocol errors and a complete list of reason codes (cause values), see the DEFINITY Enterprise Communications Server CallVisor ASAI Protocol Reference, 555-230-221.

Considerations

The adjunct uses previously received information about the party to release it from the held state. This party must have been placed on (hard or soft) hold from the station set or via the adjunct. A party may be reconnected only to the same call from which it had been put on hold as long as there is no other active call at the user’s station. If the party is already reconnected on the specified call when the ECS receives the request, a positive ACK is returned.

If the user is on-hook (in the held state), the ECS must be able to force the station off-hook or the user must go off-hook within five seconds after requesting a Third Party Reconnect. If one of the above conditions is not met, the request is denied and the party remains held.

If the user is listening to dial tone while a request for Third Party Reconnect is received, the dial tone is dropped and the user is reconnected to the held call.

If the user is listening to any other kind of tone (for example, denial) or is busy talking on another call, the Third Party Reconnect request is denied (CS0/17).

Issue 7 May 1998 4-47