Which of the following are types of analog voice gateways?
A.
CO Gateways only
B.
CO and CAS Gateways
C.
CCS and Trunk Gateways
D.
Trunk and Station Gateways
E.
CAS and Station Gateways
Explanation:
Station Gateway: Access analog station gateways connect Cisco CallManager to plain old telephone service(POTS) analog telephones,interactive voice response(IVR) systems,fax machines, and voice-mail systems.Station gateways provide Foreign Exchange Station(FXS) ports for connecting to analog devices such as telephones and faxes. Trunk Gateway: Access analog trunk gateways connect Cisco CallManager to PSTN central office(CO) or PBX trunks.Trunk gateways provide Foreign Exchange Office(FXO) ports for PSTN or PBX access and E&M ports for analog trunk connection to a legacy PBX.
Cisco CallManager System Guide, Release 3.1(2)
Understanding Voice Gateways
Cisco Analog Access Station Gateways
Station gateways let you connect the Cisco CallManager to POTS analog telephones, interactive voice response (IVR) systems, fax machines, and voice-mail systems. Station gateways provide FXS ports. The AS-2, AS-4, and AS-8 models accommodate two, four, and eight Voice over IP (VoIP) gateway channels, respectively. Cisco AS gateways communicate with Cisco CallManager using SGCP.
Cisco Access Analog Trunk Gateways
Analog trunk gateways let you connect the Cisco CallManager to standard PSTN central office (CO) or PBX trunks. Trunk gateways provide FXO ports. The AT-2, AT-4, and AT-8 models accommodate two, four, and eight VoIP gateway channels. Loop-start signaling type applies.
Cisco AT gateways communicate with Cisco CallManager using SGCP. 156. Given answer is correct, explanation is found at:
http://www.cisco.com/en/US/partner/products/sw/voicesw/ps556/products_administration_guide_chapter09186 a