Configuring the PSTN (FXO) Gateway on the SPA3102

6

 

Configuring VoIP Failover to PSTN

 

 

 

 

 

The following table lists some examples.

Example

Description

 

 

<9,:>xx.<:@gw1

Dial 9 to start outside dial tone, followed by one or

 

more digits, and route the call to Gateway 1.

 

 

[93]11<:@gw0>

Route 911 and 311 calls to the local PSTN gateway

 

 

<8,:1408>xxxxxxx<:@pstn.

Dial 8 to start outside dial tone, prepend 1408

cisco.com:5061;usr=joe;

followed by seven digits, and route the call to

pwd=joe_pwd;nat>

pstn.cisco.com:5061, with user-id = joe, and pwd =

 

bell_pwd, and enable NAT mapping

 

 

<8,:1408>xxxxxxx<:@gw2:5061;

Dial 8 to start outside dial tone, prepend 1408

usr=”Alex Bell”;pwd=

followed by seven digits, and route the call to

”anything”;nat=no>

Gateway 2, but use the given port, user-id, and

 

password, and no pstn.cisco.com:5061, and with

 

user-id = “Alex Bell” and pwd = bell_pwd, and

 

disable NAT mapping

 

 

You can set up multiple PSTN gateways at different locations and configure Line 1 to use a different gateway when dialing specific numbers.

Configuring VoIP Failover to PSTN

When power is disconnected from the SPA3102, the FXS port is connected to the FXO port. In this case, the telephone attached to the FXS port is electrically connected to the PSTN service via the FXO port. When power is applied to the ATA device, the FXS port is disconnected from the FXO port. However, if the PSTN line is in use when the power is applied to the ATA device, the relay is not flipped until the PSTN line is released. This is done so that the ATA device does not interrupt any call in progress on the PSTN line.

When Line 1 VoIP service is down (because of registration failure or loss of network link), the ATA device can be configured to automatically route all outbound calls to the internal gateway using the parameter listed below.

ATA Administration Guide

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Cisco Systems PAP2T, SPA2102, SPA3102, WRP400, SPA8000 manual Configuring VoIP Failover to Pstn, Example Description
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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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