16 Port Asynchronous Service Module Cisco Router Cards HWIC-16A Cisco HWIC-16A TBasic Parameters: Manufacturer: Cisco Device Type: Serial adapter Form Factor: Plug-in module Ports: RS-232 x 2 Data Link Protocol: RS-232 HWIC-16A Specification: Device Type Serial adapter Form Factor Plug-in module Ports RS-232 x 2 Data Link Protocol RS-232 Data Transfer Rate 230.4 Kbps Designed For Cisco 1841 2-pair, 1841 3G, 1841 4-pair, 1841 ADSL2, 1841 T1, 18XX, 1921 4-pair, 1921 ADSL2+, 1921 T1, 19XX, 28XX, 28XX 2-pair, 28XX 4-pair, 28XX V3PN, 29XX, 38XX, 38XX V3PN, 39XX Others better Models: PN Description Quantity C3650-STACK-KIT= Cisco Catalyst 3650 Stack Module Spare 1 PWR-C1-715WAC/2 715W AC Config 1 Secondary Power Supply 4 PWR-C2-250WAC/2 #N/A 1 GLC-SX-MMD 1000BASE-SX SFP transceiver module, MMF, 850nm, DOM 20 STACK-T1-1M= 1M Type 1 Stacking Cable 1 C3850-NM-4-1G= Cisco Catalyst 3850 4 x 1GE Network Module 2 GLC-SX-MMD= 1000BASE-SX SFP transceiver module, MMF, 850nm, DOM 10 GLC-SX-MMD 1000BASE-SX SFP transceiver module, MMF, 850nm, DOM 10 Pictures for reference: