
Product Brief
June 2000
Ringing, Tip/Ring, and Line Card Access Switches
L7581/2/3 and L8581
Agere Systems Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application.
Copyright  2002 Agere Systems Inc.
All Rights Reserved
June 2000
PB00-074ALC (Replaces PN98-107ALC, PN98-108ALC, and PN99-008ALC)
For additional information, contact your Agere Systems Account Manager or the following:
INTERNET:
http://www.agere.com
E-MAIL:
docmaster@agere.com
N. AMERICA:
Agere Systems Inc., 555 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18109-3286
1-800-372-2447
, FAX 610-712-4106 (In CANADA: 
1-800-553-2448
, FAX 610-712-4106)
ASIA:
Agere Systems Hong Kong Ltd., Suites 3201 & 3210-12, 32/F, Tower 2, The Gateway, Harbour City, Kowloon
Tel. (852) 3129-2000
, FAX (852) 3129-2020
CHINA: 
(86) 21-5047-1212
 (Shanghai), 
(86) 10-6522-5566
 (Beijing), 
(86) 755-695-7224
 (Shenzhen)
JAPAN: 
(81) 3-5421-1600
 (Tokyo), KOREA: 
(82) 2-767-1850
 (Seoul), SINGAPORE: 
(65) 6778-8833
, TAIWAN: 
(886) 2-2725-5858
 (Taipei)
EUROPE:
Tel. (44) 7000 624624
, FAX (44) 1344 488 045
Application
12-2366d F
CROWBAR
PROTECTION
R1
R2
TIP
RING
SW9
TEST OUT
SW8
RINGING
ACCESS
SW3 BREAK
BREAK SW4
RING
TIP
BATTERY
FEED
RING
GENERATOR
BATTERY
SCR
AND
TRIP
CKT
V
BAT
(REFERENCE)
RINGING
TEST RETURN
SW5
SW1
TEST IN
SW7
RINGING
RETURN
SW10
TEST OUT
RINGING TEST
SW6
SW2
TEST IN