Cisco 8-Port FXS DID High-Density Analog and Digital Extension Module for Voice and Fax

The Cisco EVM-HD is an industry-leading voice and fax interface module for Cisco 2821, 2851, 3825, and 3845 ISRs. It helps enable packet voice technologies with support for voice over IP (VoIP), including H.323, Media Gateway Control Protocol (MGCP) and Session Initiation Protocol (SIP); voice over Frame Relay (VoFR), and voice over ATM (VoATM), including ATM Adaptation Layer 2 (AAL2) and AAL5. The Cisco EVM-HD allows Cisco 2821, 2851, 3825, and 3845 ISRs to connect directly to the PSTN and existing telephony equipment (for example, private branch exchange [PBX], key system, analog telephones, and analog fax machines) through standard analog (FXS, DID, and FXO) and digital (BRI) interfaces. The Cisco EVM-HD supports telephony toll bypass, new packet telephony applications, and full gateway integration within the Cisco Unified Communications. IP telephony design. With support for up to 24 total voice and fax sessions, the Cisco EVM-HD is ideal for networks with high analog and BRI call-capacity requirements.

This 8-port FXS/DID voice and fax expansion module has 8 FXS and DID ports, individually configurable for FXS or DID signaling. There is no requirement for signaling type pairing of adjacent ports for this module. The FXS interface connect directly to a standard telephone, fax machine or similar device and supplies ring, voltage, and dial tone. Signaling support available in FXS mode includes loop-start and ground-start. DID trunks from the central office can be connected for off-premise Direct Inward Dial connections. Signaling support available in DID mode includes immediate, delay dial, and wink start. A maximum of 8 ports configured as DID are supported in both EVM expansion module slots combined. Thus, a maximum 16 DID ports per EVM capable ISR slot can be supported when 8 ports of EVM-HD-8FXS/DID and 8 ports of EM3-HDA-8FXS/DID are all configured as DID.