IBM Aptiva Handbook page 189

Table 17: Return codes
Digit code Word code
11 CONNECT 4800 ec *
12 CONNECT 9600 ec *
13 CONNECT 14400 ec *
14 CONNECT 19200 ec *
24 CONNECT 7200 ec *
25 CONNECT 12000 ec *
40 CONNECT 300 ec *
86 CONNECT 16800 ec *
55 CONNECT 21600 ec *
56 CONNECT 24000 ec *
57 CONNECT 26400 ec *
58 CONNECT 28800 ec *
59 CONNECT 31200 ec *
60 CONNECT 33600 ec *
88 DELAYED
89 BLACKLISTED
90 BLACKLIST FULL
* When the extended return codes configuration option is enabled, ec indicates the error control method used. Where a value for ec is included
in the error code, the error control method indicated is as follows:
V42bis V.42 error control and V.42bis data compression
V42 V.42 error control only
MNP 5 MNP class 4 error control and MNP class 5 data compression
MNP 4 MNP class 4 error control only
NoEC No error control protocol
Meaning
Connected at 4800 bps
Connected at 9600 bps
Connected at 14,000 bps
Connected at 19,200 bps
Connected at 7200 bps
Connected at 12,000 bps
Connected at 300 bps
Connected at 16,800 bps
Connected at 21,600 bps
Connected at 24,000 bps
Connected at 26,400 bps
Connected at 28,800 bps
Connected at 31,200 bps
Connected at 33,600 bps
Delay is in effect for the dialed number
Dialed number is blacklisted
Blacklist is full
Modem return codes 173