WASHINGTON — One thousand new customs officers at ports of entry, imaging technology to scan every vehicle coming into the country, increased spending on the Coast Guard, Secret Service and other agencies, and new technology at mail processing facilities to find fentanyl and other opioids — but nothing for a wall at the southwestern border.

House Democrats laid out the general terms of their offer for toughening border security on Wednesday as House and Senate negotiators met for the first time to find a deal before Feb. 15 that can prevent another government shutdown. But the Democrats’ opening bid showed how far the parties have to go in the next two weeks, and no one seems sure of what President Trump will or will not sign.

“Border security is more than physical barriers, and homeland security is more than border security,” said Representative Lucille Roybal-Allard, Democrat of California and the chairwoman of the Appropriations subcommittee that deals with homeland security. She later told reporters after the meeting that while Democrats have supported funding fencing in the past, they wanted to examine technological innovations that could be used in place of fences.