Cisco system NM-4B-U ISDN Network Module

DESCRIPTION THE 4PORT ISDN BRI WITH INTEGRATED NT-1 NETWORK MODULE PROVIDES FOUR ISDN BRI CONNECTIONS VIA RJ-45 CONNECTORS. KEY FEATURES INTERFACES/PORTS : 4 X ISDN BRI (U) WAN FORM FACTOR : PLUGIN-MODULE DIMENSIONS : 1.55 HEIGHT X 7.10 WIDTH X 7.2 DEPTH SHIPPING DIMENSIONS : 2.75 HEIGHT X 10.25 WIDTH X 16 DEPTH WEIGHT : 2 LB MAXIMUM SHIPPING WEIGHT : 2.1 SUPPORTED : PLATFORMS & MINIMUM IOS VERSIONS: 3745 - 12.2(8)T 3725 - 12.2(8)T 3660 SERIES - 12.0(7)XK 3640 - 11.1(7)AA 3620 - 11.1(7)AA 2691 - 12.2(8)T1 2650 - 12.1(3)T 2600XM SERIES - 12.1(14) OR 12.2(8)T1 2600 SERIES - 11.3(4)T 1720 - NOT AVAILABLE 1600 SERIES - NOT AVAILABLE