Siemens AG disclosed that it would pay...

Siemens AG disclosed that it would pay up to $1.15 billion for the Rolm telecommunications business it bought from International Business Machines Corp. earlier this month. The disclosure came in documents filed as part of a bid by Siemens, a West German electronics group, to join with London-based General Electric Co. to take over defense contractor Plessey Co. of Britain. IBM paid about $1.5 billion for Rolm, its wholly owned telecommunications subsidiary, which it purchased in 1984. Industry analysts said the Rolm sale represented a pullback by IBM.