Telephone circuits into the House of Representatives were once again near capacity on Friday after President Obama called on Americans to keep up their calls to Congress.

An alert from the Capitol’s call center went out Friday morning to House members’ offices:

“Due to the high volume of external calls, House telephone circuits serving 202-225-XXXX phone numbers are near capacity resulting in outside callers occasionally getting busy signals. Outbound calls are unaffected,” the alert reads. “During this time offices may wish to provide district office staff and key contacts with an alternate 202-226-XXXX extension, if available, until call volumes subside.”