ATA Voice Field Reference

SIP page

B

Escape Display

Lets you keep the Display Name private. Select yes if you

Name

want the ATA device to enclose the string (configured in the

 

Display Name) in a pair of double quotes for outbound SIP

 

messages. Any occurrences of or \ in the string is escaped

 

with \ and \\ inside the pair of double quotes. Otherwise,

 

select no.

 

The default is no.

 

 

RFC 2543 Call Hold

Configures the type of call hold: a:sendonly or 0.0.0.0.

 

The default is no; do not use the 0.0.0.0 syntax in a HOLD

 

SDP; use the a:sendonly syntax.

 

 

Mark All AVT

If set to yes, all AVT tone packets (encoded for

Packets

redundancy) have the marker bit set. If set to no, only the

 

first packet has the marker bit set for each DTMF event.

 

The default is yes.

 

 

SIP TCP Port Min

Specifies the lowest TCP port number that can be used for

 

SIP sessions. This field is not found in the PAP2T.

 

 

SIP TCP Port Max

Specifies the highest TCP port number that can be used

 

for SIP sessions. This field is not found in the PAP2T.

 

 

Voice tab > SIP page >

 

SIP Timer Values (sec) section

SIP T1

RFC 3261 T1 value (RTT estimate), which can range from 0

 

to 64 seconds.

 

The default is.5.

 

 

SIP T2

RFC 3261 T2 value (maximum retransmit interval for non-

 

INVITE requests and INVITE responses), which can range

 

from 0 to 64 seconds.

 

The default is 4.

 

 

SIP T4

RFC 3261 T4 value (maximum duration a message remains

 

in the network), which can range from 0 to 64 seconds.

 

The default is 5.

 

 

ATA Administration Guide

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Cisco Systems WRP400, SPA2102, SPA3102, SPA8000, PAP2T manual SIP Timer Values sec section, SIP T1, SIP T2, SIP T4
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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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