Compare Cisco High-Speed WAN Interface Card - Serial adapter - HDLC, RS-232, PPP, RS-530, X.21, V.35, RS-449... (HWIC-4T=) Expansion Module to Cisco 2-Port T1/E1 Multiflex Trunk Voice/WAN Interface Card (VWIC2-2MFT-T1/E1=) Expansion Module

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