Configuring Voice Services

4

 

SIP Trunking and Hunt Groups on the SPA8000

 

 

 

 

 

STEP 5 If the call is picked up by the PBX, the Line UA replies 200 OK with SDP to the internal Proxy. The Trunk UA in turn replies 200 OK to the ITSP and relay the Line SDP in the 200 OK message also. If all goes well, the Line UA and the ITSP equipment start exchanging RTP packets afterwards.

Contact List for a Trunk Group

The hunting process for incoming calls is controlled by the Contact List. The Contact List specifies the lines to ring, the order in which to ring them, the duration to ring one line before trying another line, and the maximum period to hunt. Below, the syntax is described and examples are provided to help you to configure the Contact List for each trunk group.

SYNTAX: line[,line[,line[…]]],hunt=hrule[,cfwd=target]

•line: The line numbers (1 - 8), or a wildcard * or ? to represent all lines.

•The Trunk UA rings only trunk lines, that is, lines that are assigned to a trunk group through the Voice tab > Line page, Trunk Group field. The Trunk UA does not ring any standalone lines that are included in the Contact List. The Trunk UA rings any trunk line that is included in the list, even if it is not assigned to the particular trunk group for this Contact List.

•You can instruct the SPA8000 to hunt only the phones that are on-hook, through the Voice tab > SIP page, Trunking Parameters section, Hunt Policy field. See “Setting the Hunt Policy,” on page 86.

•hunt=hrule: The hunt order, ring interval, and maximum duration, in the

following format: hunt=algo;interval;max

•algo: The hunt order.

-re: Restart. Hunting starts at the beginning of the list. If the first line does not answer within the specified interval (see below), the hunt proceeds through the lines in sequential order.

-ne: Next. The Trunk UA determines the line that was chosen in the previous hunt, and hunting starts with the next line in the list. If that line does not answer within the specified interval (see below), the hunt proceeds through the lines in sequential order.

-ra: Random order. The Trunk UA randomly chooses a line from the list. If the selected line does not answer within the specified interval (see

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Cisco Systems SPA8000, SPA2102, SPA3102, PAP2T Contact List for a Trunk Group, Syntax line,line,line…,hunt=hrule,cfwd=target
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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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