three or four digits. she was communicating with a pager. she was sending signals that told us she was still active. >> we saw her making all these pay phone call, the timing of which corresponded with high frequency messages being transmitted from the d.c. area from cuba. >> even before she was identified as a suspect, we knew the cubans were communicating to agents via high frequency messages that would have been picked up using a short wave radio. the cubans would send a message on a tuesday and twice on thursday and twice on saturday. we knew that communicating to the cubans via the i had frequency mess annuals required encryption and dekripgz disks. it's not like they were sending the messages out in the open