Highway expansion apparatus for key telephone system and...

Details Highway expansion apparatus for key telephone system and... Highway expansion apparatus for key telephone system and...

2006-11-21

2006-11-21

Tran, Quoc (Department: 2614)

Telephonic communications

Multi-line or key substation system with selective switching...

C379S165000, C379S171000, C379S225000

Reexamination Certificate

active

07139375

ABSTRACT:
In a highway expansion apparatus for a key telephone system and an operation method thereof, by connecting a MPB (main process board) of a master system with a system LMU (ink module unit) of an expansion system through a cable and generating a highway to be provided from the MPB to the expansion system, a highway of the key telephone system can be expanded.

REFERENCES:
patent: 4135063 (1979-01-01), Bosen
patent: 4292475 (1981-09-01), Hill et al.
patent: 5204861 (1993-04-01), Wiebe
patent: 5291479 (1994-03-01), Vaziri et al.
patent: 5757897 (1998-05-01), LaBarbera et al.
patent: 5778058 (1998-07-01), Gavin
patent: 5859903 (1999-01-01), Lee
patent: 6226371 (2001-05-01), Brune
patent: 6263061 (2001-07-01), Tanaka et al.
patent: 6661883 (2003-12-01), Dowser et al.
patent: 0040046 (1981-11-01), None
patent: 0324058 (1989-07-01), None
patent: 2152331 (1985-07-01), None
patent: 2173673 (1986-10-01), None
patent: 2183425 (1987-06-01), None
LG Electronics, Key Telephone System, www.lge.com/b—product/communication/e—kp/key—system/digital—sys.shtml, 3 pp.
LG Electronics, aria 300 Digital Business Telephone System, arewww.atlasgentech.co.nz/lg/300.php3, 3 pp.

Affiliated with

Also associated with

Rating

Highway expansion apparatus for key telephone system and... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Highway expansion apparatus for key telephone system and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Highway expansion apparatus for key telephone system and... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3649640