Which device is reported to detect a dial tone to trigger signaling in PacketCable signaling?

Which device is reported to detect a dial tone to trigger signaling in PacketCable signaling?

• A. EMTA (Embedded Multimedia Terminal Adapter)
• B. Central office switch
• C. Router
• D. Subscriber's home modem

Answer: (A)

In PacketCable signaling, the dial-tone detection that triggers call signaling happens in the Embedded Multimedia Terminal Adapter (EMTA) at the customer premises. The EMTA provides the analog telephone interface to the user’s phones and detects when the handset goes off-hook and a dial tone is present. That moment signals the EMTA to initiate the call setup with the network using the packet-based signaling protocol (MGCP/Megaco) to establish the call. The central office switch, router, or a plain subscriber modem aren’t responsible for this local dial-tone-triggered signaling in PacketCable; it’s the EMTA that handles the telephony signaling from the customer side.

In PacketCable signaling, the dial-tone detection that triggers call signaling happens in the Embedded Multimedia Terminal Adapter (EMTA) at the customer premises. The EMTA provides the analog telephone interface to the user’s phones and detects when the handset goes off-hook and a dial tone is present. That moment signals the EMTA to initiate the call setup with the network using the packet-based signaling protocol (MGCP/Megaco) to establish the call. The central office switch, router, or a plain subscriber modem aren’t responsible for this local dial-tone-triggered signaling in PacketCable; it’s the EMTA that handles the telephony signaling from the customer side.