Porta Systems Corp. Extends Offer to Tender Notes for Conversion.

SYOSSET, N.Y.--(BUSINESS WIRE)--Dec. 16, 1997--Porta Systems Corp. (ASE-PSI) announced today that it has extended until December 31, 1997 the deadline for conversion of its Zero Coupon Convertible Notes due January 2, 1998 on the amended conversion terms. As of December 16, 1997, approximately 90% of the Notes have been converted into Common Stock on the amended terms. Under the amended terms, as previously announced, the conversion price of the Notes will be reduced to $3.65 from $6.55.

Porta Systems designs, manufactures markets and supports communications equipment used in telecommunications, voice, video, and data networks worldwide.

CONTACT: Porta Systems Corp.

Mr. Edward B. Kornfeld

Senior Vice President,

Chief Financial Officer

516/364-9300