jccc@killer.Dallas.TX.US (Juan Castillo) (04/04/89)
I need some help with my AT&T 2224 CEO modem. I have an ATT6300 pc and I'm using ProComm Plus for communications package, this is my problem: After the far end answers it takes about 8 to 10 seconds before i get the CONNECT message. I have tried just about every combination of dip switch settings and several of the AT commands. The same thing happens when I use XTALK as the comm package, even after setting the options according to the manual that came with the modem. Does anyone out in the Net-land have any ideas? Thanks in advance Juan Castillo
wtm@neoucom.UUCP (Bill Mayhew) (04/05/89)
The default condition of the CE02224 is to the AT\N2 if you are using the "AT" command set. This is auto MNP mode. MNP sends packets to the other end for 7 seconds, trying to sync up. If after 7 seconds it doesn't get a valid ACK, it falls back to a regular connection. Even if the other end is MNP, it takes a couple of seconds for the initial handshake. If the other end isn't MNP, it'll receive a bunch of garbage characters from your end as the handshake is attempted. On gettys that echo back, this can sometimes make your modem think the other end is MNP, when in fact, it is not. The symptom is continuous flashing of the ERR LED on your 2224. To disable MNP, send the string, AT\N0. I don't have any idea what the AT&T operating mode ":" command equivalent is. The defalut AT\N2 isn't re-entered when the connection is dropped you have to manually enter the command when you finish your call. Bill