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This section describes the hardware and software features of the Cisco Analog Telephone Adaptor (Cisco ATA) and includes a brief overview of the Skinny Client Control Protocol (SCCP).
The Cisco ATA analog telephone adaptors are handset-to-Ethernet adaptors that allow regular analog telephones to operate on IP-based telephony networks. Cisco ATAs support two voice ports, each with an independent telephone number. The Cisco ATA 188 also has an RJ-45 10/100BASE-T data port.
This section covers the following topics:
The Cisco ATA, which operates with Cisco voice-packet gateways, uses broadband pipes deployed through digital subscriber line (DSL), fixed wireless, cable modem, and other Ethernet connections.
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Note The term Cisco ATA refers to both the Cisco ATA 186 and the Cisco ATA 188, unless otherwise stated. |
The Skinny Client Control Protocol (SCCP) is the Cisco standard for real-time calls and conferencing over Internet Protocol (IP). With SCCP, Cisco IP Phones can co-exist in an H.323 environment. When a Cisco CallManager is coupled with an H.323 Gatekeeper or an MGCP Call Agent, a Cisco ATA running SCCP interoperates with H.323 terminals on the far end to establish, control and clear audio calls.
Figure 1-4 illustrates the architecture of an SCCP network.
Cisco ATAs are compact, easy-to-install devices. Figure 1-5 shows the rear panel of the Cisco ATA 186. Figure 1-6 shows the rear panel of the Cisco ATA 188.
The unit provides the following connectors and indicators:
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Note The Cisco ATA 188 performs auto-negotiation for duplexity and speed and is capable of 10/100 Mbps, full-duplex operation. The Cisco ATA 186 is fixed at 10 Mbps, half-duplex operation. |
The function button lights when you pick up the handset of a telephone attached to the Cisco ATA. The button blinks quickly when the Cisco ATA is upgrading its configuration.
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Note If the function button blinks slowly, the Cisco ATA cannot find the DHCP server. Check your Ethernet connections and make sure the DHCP server is available. |
Pressing the function button allows you to access to the voice configuration menu. For additional information about the voice configuration menu, see the "Voice Configuration Menu" section.
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Caution Never press the function button during an upgrade process. Doing so may interfere with the process and may permanently disable the Cisco ATA. |
This section contains topics that cover the protocols and services that the Cisco ATA supports:
The Cisco ATA supports the Skinny Client Control Protocol (SCCP) Rev. 3.0 and 3.1.
The Cisco ATA supports the following voice codecs (check your other network devices for the codecs they support):
When operating with a low-bit-rate codec, the Cisco ATA can support either two G.723.1 connections or one G.729 connection. The selection of G.723.1 or G.729 must be statically configured. When G.723.1 is the low-bit-rate codec, each FXS port is allocated with one G.723.1 connection. When G.729 is used, only one FXS port can use G.729. For more information, see the "LBRCodec" section and "ConnectMode" section.
In addition to SCCP, the Cisco ATA supports the following signaling protocols:
SCCP and MGCP share the same software image. SIP and H.323 also share a software image, which is separate from the SCCP/MGCP image. If you wish to perform a cross-protocol upgrade from SCCP to another signaling image, see "Performing a Cross-Protocol Upgrade."
Other protocols that the Cisco ATA supports include the following:
For an alphabetical list of Cisco ATA basic services and the parameters for configuring each service, see Table 3-5.
These services include the following features:
The Cisco ATA supports two modes of fax services, in which fax signals are transmitted using the G.711 codec:
How you set Cisco ATA fax parameters depends on what network gateways are being used. You may need to modify the default fax parameter values (see "Configuring and Debugging Fax Services").
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Note Success of fax transmission depends on network conditions and fax modem response to these conditions. The network must have reasonably low network jitter, network delay, and packet loss rate. |
This section provides an overview of telephone services that the Cisco ATA allows the user to perform either before or during a call. For end-user procedures on how to use these services, see "How to Use Pre-call and Mid-call Services."
This section contains the following topics:
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Note The services listed in this section are supported by Cisco CallManager. For Cisco IOS Telephony Service (ITS)-supported services, refer to ITS documentation. |
Table 1-1 lists the pre-call services that the Cisco ATA supports for the SCCP protocol. Table 1-1 also includes references to where the user procedure is described for each service.
The method of initiating and using mid-call services for the SCCP protocol differs according to mode. The following three modes are available for invoking mid-call services:
The mode can be configured using bits 28 and 29 of the ConnectMode parameter (see the "ConnectMode" section).
Table 1-2 lists the mid-call services that the Cisco ATA supports for each of the three modes. Table 1-2 also includes references to where the end-user procedure is described for each service.
Table 1-2 Mid-call Services and Where to Find End-user Procedures
| Style and Related Services | Procedure Reference |
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Table 1-3 provides the basic steps required to install and configure the Cisco ATA to make it operational in a typical Cisco CallManager environment.
Table 1-3 Overview of the Steps Required to Install and Configure the Cisco ATA and Make it Operational
Posted: Wed Jul 9 16:59:26 PDT 2003
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