
To jam phone lines/networks, to jam up phone lines, become clogged.
In News:"A rare East Coast earthquake that shook people from North Carolina to Boston today prompted heavy call volume that jammed cell phone networks throughout the region."
CNet News.
"Before the earth had even stopped shaking Tuesday afternoon, thousands along the
East Coast calling and texting loved ones
jammed up phone lines across the country."
The Times.
"And as phone lines
became clogged,
social media websites like
Twitter and
Facebook became a place to communicate."
The Times.
"The high volume
jammed up lines, but
Schweder said the company has protocols in place to reroute calls and help ease the congestion."
NBC.
Foto: The Times (UK)