ATA Voice Field Reference

PSTN Line page (SPA3102)

B

PSTN Hook Flash

The length of the hook flash in seconds. During a PSTN-to-

Len

VoIP gateway call, the ATA device processes the out-of-

 

band hook flash signal sent from the VoIP peer through a

 

hook-flash (momentary on-hook signal) on the FXO port.

 

This allows the VoIP peer to initiate a three-way

 

conference call and subsequent call transfer. The duration

 

of the on-hook signal can be configured using this

 

parameter.

 

The default is 0.25. The permitted range is limited to 0.02

 

to 1.6 seconds.

 

 

PSTN Ring Thru

Specify the delay before incoming PSTN calls will ring Line

CWT Delay

1 using a Call Waiting

 

Tone. The default is 3.

 

 

PSTN Ring Timeout

Specify the delay after a ring burst before the Gateway

 

decides that the PSTN ring has ended. The default is 5.

 

 

PSTN Dialing Delay

Specify the delay after the PSTN phone line is on-hook

 

before the Gateway dials a PSTN number. The default is 1.

 

 

PSTN Dial Digit Len

Specify the on/off time when the Gateway transmits digits

 

through the Line (FXO) port. The syntax is on-time/off-time,

 

expressed in seconds with up to two decimal places. The

 

permitted range is 0.05 to 3.00. The default is .1/.1.

 

 

PSTN Hook Flash

Default is .25.

Len

 

 

 

Voice tab > PSTN Line page >

PSTN Disconnect Detection section

Detect CPC

CPC is a brief removal of tip-and-ring voltage. If enabled,

 

the SPA will disconnect both call legs when this signal is

 

detected during a gateway call.

 

The default is yes.

 

 

Detect Polarity

If enabled, SPA will disconnect both call legs when this

Reversal

signal is detected during a gateway call. If it is a PSTN

 

gateway call, the 1st polarity reversal is ignored and the

 

2nd one triggers the disconnection. For VoIP gateway call,

 

the 1st polarity reversal triggers the disconnection.

 

The default is yes.

 

 

ATA Administration Guide

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Cisco Systems PAP2T, SPA2102, SPA3102, WRP400, SPA8000 manual Pstn Disconnect Detection section
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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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