Is there a way to tell wvdial to wait for the answer of a command?

Some AT commands in wvdial return their answers with a delay. This period of time depends on the command. For instance, when you want to scan for available networks, you can use the AT+COPS=? command. The scanning process takes about 30s, but wvdial doesn't wait until it's finished and resend the command. After the second try, wvdial gives up with the following error: # wvdial info-scan --> WvDial: Internet dialer version 1.61 --> Initializing modem. --> Sending: AT+COPS=? --> Re-Sending: AT+COPS=? --> Modem not responding. After some time (30s), I can issue another command via wvdial, it can be anything, for instance ATZ+CFUN=1, which does nothing when the modem is already on, but after sending the command, I get the output from the previous one: # wvdial modem-start --> WvDial: Internet dialer version 1.61 --> Initializing modem. --> Sending: ATZ+CFUN=1 +COPS: (2,"T-Mobile.pl","TM PL","26002",2),(1,"T-Mobile.pl","TM PL","26002",7),(3,"Plus","PLUS","26001",7), (3,"Play","Play","26006",7),(3,"Orange","Orange","26003",7), (3,"Play","Play","26006",2),(3,"Orange","Orange","26003",2), (3,"Plus","PLUS","26001",2),,(0,1,2,3,4),(0,1,2) OK So is there a way to set some kind of timeout for the commands so they could get the delayed answer?