ATA Voice Field Reference

SIP page

B

RTCP Tx Interval

Interval for sending out RTCP sender reports on an active

 

connection. It can range from 0 to 255 seconds. During an

 

active connection, the ATA device can be programmed to

 

send out compound RTCP packet on the connection. Each

 

compound RTP packet except the last one contains a SR

 

(Sender Report) and a SDES.(Source Description). The last

 

RTCP packet contains an additional BYE packet. Each SR

 

except the last one contains exactly 1 RR (Receiver

 

Report); the last SR carries no RR. The SDES contains

 

CNAME, NAME, and TOOL identifiers. The CNAME is set to

 

<User ID>@<Proxy>, NAME is set to <Display Name> (or

 

Anonymous if user blocks caller ID), and TOOL is set to the

 

Vendor/Hardware-platform-software-version (such as

 

Cisco/ATA device-1.0.31(b)). The NTP timestamp used in

 

the SR is a snapshot of the ATA device’s local time, not the

 

time reported by an NTP server. If the ATA device receives

 

a RR from the peer, it attempts to compute the round trip

 

delay and show it as the <Call Round Trip Delay> value

 

(ms) in the Info section of ATA device web page.

 

The default is 0.

 

 

No UDP Checksum

Select yes if you want the ATA device to calculate the UDP

 

header checksum for SIP messages. Otherwise, select no.

 

The default is no.

 

 

Stats In BYE

Determines whether the ATA device includes the P-RTP-

 

Stat header or response to a BYE message. The header

 

contains the RTP statistics of the current call. Select yes or

 

no from the drop-down menu. The format of the P-RTP-Stat

 

header is:

 

P-RTP-State: PS=<packets sent>,OS=<octets

 

sent>,PR=<packets received>,OR=<octets

 

received>,PL=<packets lost>,JI=<jitter in ms>,LA=<delay

 

in ms>,DU=<call duration in

 

s>,EN=<encoder>,DE=<decoder>.

 

The default is no.

 

 

ATA Administration Guide

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Cisco Systems SPA3102, SPA2102, WRP400, SPA8000, PAP2T manual ATA Administration Guide 139
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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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