Configuring the PSTN (FXO) Gateway on the SPA3102

6

 

Other Options

 

 

 

 

 

Other Options

This section describes other options provided by the ATA device. It includes the following topics:

•

•

•

”PSTN Call to Ring Line 1” section on page104

”Symmetric RTP” section on page104

”Call Progress Tones” section on page105

PSTN Call to Ring Line 1

This feature allows a PSTN caller to ring Line 1. When the PSTN line rings, the PSTN Line makes a local VoIP call to Line 1. If Line 1 is busy, it stops. After a given number of rings, the VoIP gateway picks up the call.

Symmetric RTP

The Symmetric RTP parameter is used to send audio RTP to the source IP and port of the inbound RTP packets. This facilitates NAT traversal.

The following table lists symmetric RTP parameters.

Parameter

Web

Description

Value

 

Page

 

 

 

 

 

 

Symmetric RTP

Line 1

Enable symmetric RTP operation. If enabled,

Yes or

 

 

the ATA device sends RTP packets to the

No

 

 

source address of the last received valid

The

 

 

inbound RTP packet. If disabled, the ATA

 

 

default is

 

 

device sends RTP to the destination as

 

 

yes.

 

 

indicated in the inbound SDP.

 

 

 

 

 

 

 

Symmetric RTP

PSTN

Same as above for the PSTN line.

Yes or

 

Line

 

No

 

 

 

The

 

 

 

default is

 

 

 

yes.

 

 

 

 

ATA Administration Guide

104

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Cisco Systems SPA3102, SPA2102, WRP400, SPA8000, PAP2T manual Other Options, Pstn Call to Ring Line, Symmetric RTP
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PAP2T, SPA8000, SPA3102, WRP400, SPA2102 specifications

The Cisco Systems SPA2102 is a versatile Voice over Internet Protocol (VoIP) adapter that serves as a bridge between traditional telephony systems and modern IP networks. Designed primarily for small to medium businesses, the SPA2102 is highly regarded for its reliability, ease of use, and rich feature set. This device allows users to make and receive phone calls over the internet while maintaining the ability to connect traditional analog phones.

One of the standout features of the SPA2102 is its dual-port capability. The device includes two FXS ports, allowing users to connect two separate analog telephones. This makes it an ideal choice for businesses that want to retain their existing telephony infrastructure while transitioning to a VoIP system. The ability to utilize two telephone lines simultaneously provides flexibility and convenience, especially for users in a busy office environment.

The SPA2102 leverages Session Initiation Protocol (SIP) technology, which is widely recognized for its robustness and interoperability. The support for SIP ensures that the SPA2102 can work seamlessly with various VoIP service providers, offering users a broad range of options for their telecommunication needs. In addition to SIP, the device supports various codecs, including G.711, G.726, and G.729, allowing for flexible audio quality settings and bandwidth management.

Security is also a critical aspect of the SPA2102. It incorporates advanced encryption methods, such as Secure Real-time Transport Protocol (SRTP) and Transport Layer Security (TLS), to protect voice communications from potential eavesdropping. This focus on security makes the SPA2102 a reliable choice for businesses concerned about the confidentiality of their conversations.

The device is easy to configure and manage, thanks to its web-based interface. This allows administrators to quickly set up the adapter, manage network settings, and troubleshoot any issues that may arise. Furthermore, the SPA2102 supports Quality of Service (QoS) features, ensuring that voice traffic is prioritized over other types of network traffic, which enhances call quality and reliability.

Overall, the Cisco SPA2102 is a powerful, user-friendly VoIP adapter that combines traditional telephony with modern IP technology. Its dual-port capability, support for SIP, extensive security features, and ease of configuration make it a solid choice for businesses looking to innovate their communication systems while minimizing disruption. Whether used in a small office or a larger organizational setting, the SPA2102 continues to be a reliable component of VoIP solutions.
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