Network equipment maker Cisco Systems posted a 37 percent rise in quarterly profit on solid demand from telecoms carriers, but its shares fell 9 percent on concerns about its outlook amid U.S. economic weakness.

Chief Executive John Chambers told analysts on a conference call on Wednesday that he expected U.S. enterprise business to be "lumpy," and he saw "dramatic decreases" in orders from U.S. financial institutions and auto companies in the last quarter.