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Cisco 860 Series, Cisco 880 Series, and Cisco 890 Series Integrated Services Routers Hardware Installation Guide
OL-16215-11
Chapter 1 Product Overview
Hardware Features
14. G.SHDSL = (global industry standard) symmetrical high-speed DSL.
15. 3G = Third-Generation.
16. DSLAM = digital subscriber line access multiplexer.
17. SRST = Survivable Remote Site Telephony.
18. FXO = Foreign Exchange Office.
19. FXS = Foreign Exchange Station.
20. DID = Direct Inward Dialing.
21. SFP = small-form-factor pluggable.