Step Station Call Info Description | Cisco Systems ATA 188, ATA 186

Appendix D SCCP Call Flows

Call Flow Scenarios for Successful Calls

Step	Station Call Info	Description

Step 18	Station Open Receive	Cisco CallManager allows Cisco ATA 1 to begin receiving a
	Channel—Cisco CallManager to Cisco ATA 1	unicast RTP stream.

Step 19	Station Open Receive	Cisco CallManager allows Cisco ATA 2 to begin receiving a
	Channel—Cisco CallManager to Cisco ATA 2	unicast RTP stream.

Step 20	Station Call Info—Cisco CallManager to	Cisco CallManager informs Cisco ATA 1 of called and calling
	Cisco ATA 1	party identification information.

Step 21	Station Open Receive Channel	Cisco ATA 1 provides the following information to the
	Ack—Cisco ATA 1 to Cisco CallManager	Cisco CallManager:
		• Status of the open action
		• Receive-port address and number for transmission to the
		remote end.

Step 22	Station Start Media	Cisco CallManager commands Cisco ATA 2 to become the source
	Transmission—Cisco CallManager to	for the multicast address.
	Cisco ATA 2

Step 23	Station Open Receive Channel	Cisco ATA 2 provides the following information to the
	Ack—Cisco ATA 2 to Cisco CallManager	Cisco CallManager:
		• Status of the open action
		• Receive-port address and number for transmission to the
		remote end.

Step 24	Station Start Media	Cisco CallManager commands Cisco ATA 1 to become the source
	Transmission—Cisco CallManager to	for the multicast address.
	Cisco ATA 1

Step 25	Station On Hook—Cisco ATA 2 to	Cisco ATA 2 informs the Cisco CallManager that the Cisco ATA is
	Cisco CallManager	now in an On Hook condition.

Step 26	Station Close Receive	Cisco CallManager terminates the reception of an RDT stream
	channel—Cisco CallManager to Cisco ATA 1	between Cisco ATA 1 and Cisco ATA 2.

Step 27	Station Set Lamp (Off)—Cisco CallManager to	When the Cisco ATA detects that one port is in an off-hook state,
	Cisco ATA 2	the Cisco ATA turns on its Function button, then turns off the
		Function button once both ports are in the on-hook state.

Step 28	Station Stop Media	Cisco CallManager stops Cisco ATA 1 from being the source of the
	transmission—Cisco CallManager to	RTP stream in a multicast conference.
	Cisco ATA 1—Cisco CallManager to
	Cisco ATA 2

Step 29	Station Close Receive Channel—Cisco	Cisco CallManager terminates the reception of an RDT stream
	CallManager to Cisco ATA 2	between Cisco ATA 1 and Cisco ATA 2.

Step 30	Station Set Lamp (Off)—Cisco CallManager to	When the Cisco ATA detects that one port is in an off-hook state,
	Cisco ATA 1	the Cisco ATA turns on its Function button, then turns off the
		Function button once both ports are in the on-hook state.

Step 31	Station Stop Media Transmission—Cisco	Cisco CallManager terminates the reception of an RDT stream
	CallManager to Cisco ATA 2	between Cisco ATA 1 and Cisco ATA 2.

Step 32	Station On Hook—Cisco ATA 1 to Cisco	Cisco ATA informs the Cisco CallManager that Cisco ATA 1 is
	CallManager	now in an On Hook condition.

Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SCCP)

	OL-3141-01	D-7

ATA 188, ATA 186 specifications

The Cisco Systems ATA 186, or Analog Telephone Adapter, revolutionized the way traditional telephony interacted with Voice over Internet Protocol (VoIP) systems. Designed primarily for home and small office use, the ATA 186 allows users to connect standard analog phones and fax machines to a network, enabling them to take advantage of the benefits of VoIP technology.

One of the defining features of the ATA 186 is its dual port architecture. It includes two FXS ports, allowing users to connect up to two analog telephones. This functionality means that multiple devices can leverage VoIP services simultaneously without the need for separate adapters for each phone. The flexibility of the ATA 186 helps streamline the user experience, facilitating voice communication over an IP network while ensuring users can still use their existing phone equipment.

The ATA 186 employs various technologies to maintain high-quality voice calls. It supports standard voice codecs such as G.711 and G.729, which ensure efficient bandwidth usage while preserving call clarity. The adaptive jitter buffer technology further enhances call quality, compensating for network variations and minimizing latency, which is crucial for clear and uninterrupted conversations.

Additionally, the ATA 186 provides users with advanced calling features that were traditionally available only on PBX systems. These features include caller ID, call waiting, and voicemail functionality, integrating seamlessly with typical telephony services. The device also supports T.38 fax relay, allowing users to send and receive faxes over the internet, thus addressing the needs of environments where fax communication remains essential.

The security of VoIP conversations is also a priority for the ATA 186. It employs encryption protocols such as Secure Real-time Transport Protocol (SRTP) and Transport Layer Security (TLS), ensuring that voice data is securely transmitted across the network. This focus on security helps protect sensitive information transmitted during calls.

Installation and configuration of the ATA 186 is streamlined, with an intuitive web-based interface that simplifies the setup process. This accessibility makes it suitable for users with varying levels of technical expertise, as frequently required adjustments, such as network configurations and firmware updates, can be easily managed.

In conclusion, the Cisco Systems ATA 186 stands out as a versatile and robust solution for users looking to integrate analog phones into a VoIP environment. With its dual port capabilities, high-quality voice codecs, advanced call features, and security measures, it offers a compelling choice for both residential and commercial users seeking seamless telephony integration. As technology evolves, devices like the ATA 186 remain cornerstones in bridging traditional telephony with modern communication systems.