These are common CAPI message and error codes listed by workgroup and expanded by V.110, 1.TR.6 and manufacturer-developed messages. All messages are shown as four hexadecimal digits (i.e., each ranging from '0' to 'F'). If a message starts with "33" (i.e., "33xx"), it usually hints at an installation problem with your ISDN board or telephone system. Error messages of the "34xx" variety are caused by a remote party or the ISDN net itself. In case no modem answer is supplied below, the modem returns a NO CARRIER signal.
| # | Meaning | Modem Answer |
|---|---|---|
| 0000 | request accepted | |
| 0001 | NCPI not supported by current protocol, NCPI ignored | |
| 0002 | flags not supported by current protocol, flags ignored | |
| 0003 | alert already sent by another application | |
| 1001 | too many applications | |
| 1002 | logical block size too small, must be at least 128 bytes | |
| 1003 | buffer exceeds 64k byte | |
| 1004 | message buffer size too small, must be at least 1024 bytes | |
| 1005 | maximum number of logical connection not supported | |
| 1006 | reserved | |
| 1007 | the message could not be accepted due to an internal busy condition | |
| 1008 | OS resource error (e.g., no memory) | |
| 1009 | CAPI not installed | |
| 100A | controller does not support external equipment | |
| 100B | controller does only support external equipment | |
| 1101 | illegal application number | |
| 1102 | illegal command or subcommand or message length less than 12 octets | |
| 1103 | queue is full | |
| 1104 | queue is empty | |
| 1105 | queue overflow | |
| 1106 | unknown notification parameter | |
| 1107 | internal busy condition | |
| 1108 | OS resource error (e.g., no memory) | |
| 1109 | CAPI not installed | |
| 110A | controller does not support external equipment | |
| 110B | controller does only support external equipment | |
| 2001 | message not supported in current state | |
| 2002 | illegal controller/PLCI/NCCI | |
| 2003 | out of PLCI | |
| 2004 | out of NCCI | |
| 2005 | out of LISTEN | |
| 2006 | out of FAX resources | |
| 2007 | illegal message parameter coding | |
| 3001 | B1 protocol not supported | |
| 3002 | B2 protocol not supported | |
| 3003 | B3 protocol not supported | |
| 3004 | B1 protocol parameter not supported | |
| 3005 | B2 protocol parameter not supported | |
| 3006 | B3 protocol parameter not supported | |
| 3007 | B protocol combination not supported | |
| 3008 | NCPI not supported | |
| 3009 | CIP not supported | |
| 300A | flags not supported | |
| 300B | facility not supported | |
| 300C | data length not supported by current protocol | |
| 300D | reset procedure not supported by current protocol | |
| 300E | TEI assignment failed | |
| 3301 | protocol error layer 1 | |
| 3302 | protocol error layer 2 | |
| 3303 | protocol error layer 3 | |
| 3304 | call was given to another application | |
| T.30 specific | ||
| 3311 | connecting not successful, remote is no G3 fax | |
| 3312 | connecting not successful, training not successful | |
| 3313 | disconnected before transfer, transfer mode not supported by remote | |
| 3314 | disconnected during transfer, remote abort | |
| 3315 | disconnected during transfer, remote procedure error | |
| 3316 | disconnected during transfer, local tx-data underrun | |
| 3317 | disconnected during transfer, local rx-data overflow | |
| 3318 | disconnected during transfer, local abort | |
| 3319 | illegal parameter coding (e.g., SFF coding error) | |
| Network specific | ||
| 3481 | unassigned number | |
| 3482 | no route to specified transit network | |
| 3483 | no route to destination | |
| 3486 | channel unacceptable | NO DIALTONE |
| 3487 | call awarded and being delivered in an established channel | |
| 3490 | normal call clearing | |
| 3491 | user busy | BUSY |
| 3492 | no user responding | NO ANSWER |
| 3493 | no answer from user | NO ANSWER |
| 3495 | call rejected | BUSY |
| 3496 | number changed | |
| 349A | non-selected user clearing | BUSY |
| 349B | destination out of order | |
| 349C | invalid number format | |
| 349D | facility rejected | |
| 349E | response to STATUS ENQ. | |
| 349F | normal, unspec. | |
| 34A2 | no circuit/channel available | BUSY |
| 34A6 | network out of order | NO DIALTONE |
| 34A9 | temporary failure | NO DIALTONE |
| 34AA | switch equipment congestion | NO DIALTONE |
| 34AB | access information discarded | |
| 34AC | required circuit/channel not available | NO DIALTONE |
| 34AF | resources unavailable | BUSY |
| 34B1 | quality of service unavailable | |
| 34B2 | required facility not subscribed | |
| 34B9 | bearer capability not authorized | NO DIALTONE |
| 34BA | bearer capability not present | NO DIALTONE |
| 34BF | service/option not available | |
| 34C1 | bearer capability not implemented | NO DIALTONE |
| 34C2 | channel type not implemented | |
| 34C5 | req. facility not implemented | |
| 34C6 | only restricted digital info available | |
| 34CF | service/option not available | |
| 34D1 | invalid call reference value | |
| 34D2 | ident. channel non-existent | |
| 34D3 | a suspended call exists, but this call identity does not | |
| 34D4 | call identity in use | |
| 34D5 | no call suspended | NO DIALTONE |
| 34D6 | call having the requested call identity has been cleared | |
| 34D8 | incompatible destination | NO ANSWER |
| 34DB | invalid transit network | |
| 34DF | invalid message | NO DIALTONE |
| 34E0 | mandantory info element missing | NO DIALTONE |
| 34E1 | message type non-existent or not implemented | NO DIALTONE |
| 34E2 | message not compatible with call state/message type non-existent or not impl. | NO DIALTONE |
| 34E3 | info element non-existent or not implemented | NO DIALTONE |
| 34E4 | invalid info element contents | NO DIALTONE |
| 34E5 | message incompatible with call state | |
| 34E6 | recovery on timer expiry | NO DIALTONE |
| 34EF | protocol error | NO DIALTONE |
| 34FF | interworking, unspecified | |
| Modem specific | ||
| 3500 | normal end of connection | |
| 3501 | carrier lost | |
| 3502 | negotiation error, no remote error correcting modem | |
| 3503 | no answer to protocol request | |
| 3504 | remote modem only works in synch. mode | |
| 3505 | framing failure | |
| 3506 | protocol negotiation failure | |
| 3507 | other modem sent bad protocol request | |
| 3508 | synch.info (data or flags) missing | |
| 3509 | normal end of connection from remote modem | |
| 350A | no answer from remote modem | |
| 350B | protocol error | |
| 350C | error on compression | |
| 350D | no connect (timeout ot wrong modulation) | |
| 350E | no protocol fallback allowed | |
| 350F | no modem or fax on requested number | |
| 3510 | handshake error | |