Quick tech specs
- Voice / fax module
- ISDN BRI ST
- for Cisco 1841
- 1841 ADSL2
- 1921 ADSL2+
- 28XX
- 38XX
- HWIC
- digital ports: 4
- 1841 3G
- 1921 4-pair
- 19XX
- 29XX
- 39XX
Know your gear
Cisco integrated services routers offer a wide variety of WAN connectivity modules to accommodate the range of application needs in customer networks. The Cisco 4-Port ISDN BRI S/T High-Speed WAN Interface Card offers BRI-S/T-port-based WAN connectivity for modular routers deployed in Small to Medium-sized Businesses (SMBs) and enterprise branch offices.