Cisco 4-Port T1/E1 Clear Channel High-Speed WAN Interface Card, Wired, 0 - 40 °C, -40 - 70 °C, 5 - 95%, EN60950, 3.08 x 4.74 x 0.752" (78.2 x 120.4 x 19.1 mm)

8-Port Asynchronous/Synchronous High-Speed WAN Interface Card.

1-Port Serial HWIC Front Panel

1-Port Serial HWIC Front Panel, RF

2-Port Serial WAN Interface Card

2-Port Serial WAN Interface Card, RF

1-Port Serial WAN Network Interface Card

2-Port Serial WAN Network Interface Card