GL-2

Glossary

compression

CoS

The running of a data set through an algorithm that reduces the space required to store or the bandwidth required to transmit the data set. Compare with companding and expansion.

Class of service. An indication of how an upper-layer protocol requires a lower-layer protocol to treat its messages. In SNA subarea routing, CoS definitions are used by subarea nodes to determine the optimal route to establish a given session. A CoS definition comprises a virtual route number and a transmission priority field.

DHCP	Dynamic Host Configuration Protocol. Provides a mechanism for allocating IP addresses dynamically
	so that addresses can be reused when hosts no longer need them.
dial peer	An addressable call endpoint. In Voice over IP (VoIP), there are two types of dial peers: POTS and
	VoIP.
DNS	Domain Name System. System used on the Internet for translating names of network nodes into
	addresses.
DSP	Digital signal processor. A DSP segments the voice signal into frames and stores them in voice
	packets.
DTMF	Dual tone multifrequency. Tones generated when a button is pressed on a telephone, primarily used in
	the U.S. and Canada.

E.164	The international public telecommunications numbering plan. A standard set by the ITU-T which
	addresses telephone numbers.
endpoint	A SIP terminal or gateway. An endpoint can call and be called. It generates and/or terminates the
	information stream.
expansion	The process of running a compressed data set through an algorithm that restores the data set to its
	original size. Compare with companding and compression.

firewall		Router or access server, or several routers or access servers, designated as a buffer between any
		connected public networks and a private network. A firewall router uses access lists and other methods
		to ensure the security of the private network.
FoIP		Fax over IP
FQDN		Fully Qualified Domain (FQDN) format “mydomain.com” or “company.mydomain.com.”
FSK		Frequency shift key.
		Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SCCP)

	GL-2	OL-3141-01

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.

Cisco Systems ATA 186, ATA 188 manual GL-2

Models: ATA 188 ATA 186

OL-3141-01

ATA 188, ATA 186 specifications