ATA Voice Field Reference

PSTN Line page (SPA3102)

B

NAT Keep Alive

To send the configured NAT keep alive message

Enable

periodically, select yes. Otherwise, select no.

 

The default is no.

 

 

NAT Keep Alive

Enter the keep alive message that should be sent

Msg

periodically to maintain the current NAT mapping. If the

 

value is $NOTIFY, a NOTIFY message is sent. If the value is

 

$REGISTER, a REGISTER message without contact is sent.

 

Escape sequence of %xx is also accepted. For example,

 

%0d%0a is unescaped into \r\n (CRLF).

 

The default is $NOTIFY.

 

 

NAT Keep Alive

Destination that should receive NAT keep alive messages.

Dest

If the value is $PROXY, the messages are sent to the

 

current or outbound proxy.

 

The default is $PROXY.

 

 

Voice tab > PSTN Line page >

Network Settings section

SIP ToS/DiffServ

TOS/DiffServ field value in UDP IP packets carrying a SIP

Value

message.

 

The default is 0x68.

 

 

SIP CoS Value [0-7]

CoS value for SIP messages.

 

The default is 3.

 

 

RTP ToS/DiffServ

ToS/DiffServ field value in UDP IP packets carrying RTP

Value

data.

 

The default is 0xb8.

 

 

RTP CoS Value [0-

CoS value for RTP data.

7]

The default is 6.

 

 

 

ATA Administration Guide

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Cisco Systems PAP2T, SPA2102, SPA3102, WRP400, SPA8000 manual ATA Administration Guide 192
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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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