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Polycom 550 manual Use of IP Networks through the Pstn, Use of Voice Compression through the Pstn

Models: 550

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User Guide SoundPoint IP 550/560 Phone

Safety and Compliance (continued)

New Zealand Telepermit Special Conditions

PTC General Warning

1.The grant of a Telepermit for any item of terminal equipment indicates only that Telecom has accepted that the item complies with minimum conditions for connection to its network. It indicates no endorsement of the product by Telecom, nor does it provide any sort of warranty. Above all, it provides no assurance that any item will work correctly in all respects with another item of Telepermitted equipment of a different make or model, nor does it imply that any product is compatible with all of Telecom's network services.

The Use of IP Networks through the PSTN

2.Internet Protocol (IP) by its nature introduces delay into speech signals as each data packet is formulated and addressed. Telecom Access Standards recommends that

suppliers, designers and installers using this technology for calls to or from the PSTN refer to ITU E Model requirements in the design of their networks. The overall aim is to minimise delay, distortion and other transmission impairments, particularly for those calls involving cellular and international networks, which already suffer extensive delay.

The Use of Voice Compression through the PSTN

3.Because of the extensive delay already experienced when calling cellular and international networks, some of which is already caused by their use of voice

compression technologies. Telecom Access Standards will only approve G711 voice technology for use on the PSTN. G711 is an 'Instantaneous Speech encoding

Technique' whereas G729 and all its variants are considered 'Near Instantaneous' introducing additional delay into the speech signal.

Echo cancellation

4.Echo cancellers are not normally required in the Telecom PSTN because geographic delays are acceptable where CPE return loss is maintained within Telepermit limits. However, those private networks making use of Voice over IP technology are required to provide echo cancellation for all voice calls. The combined effect of audio / VoIP conversion delay and IP routing delay can cause the echo cancellation time of 64 mS to be required.

Modification of these Polycom Soundpoint IP 320, 330, 430, 550, 650 VoIP Telephones for the New Zealand network

5.All samples of Polycom Soundpoint IP 320, 330, 430, 550, 650 VoIP Telephones connected to the Telecom network shall be modified as described in KTL Test Report

Nos. 8A1680ANZ1 and 8A1680ANZ2. The modified software enables the telephones to comply with the maximum delay requirement given in PTC220 paragraph 8.3.5. Failure to do so will cause the cancellation of this Telepermit..

Regulatory Notices - 6

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Polycom 550 manual Use of IP Networks through the Pstn, Use of Voice Compression through the Pstn
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550 specifications

The Polycom 650 and 550 are advanced conference phones designed to enhance audio communication in business environments. These devices are part of the Polycom SoundStation series and are widely recognized for their superior sound quality and user-friendly interface.

The Polycom SoundStation IP 650 is particularly noted for its support of Voice over IP (VoIP) technology. This means that it can connect to a VoIP network, allowing users to make calls over the internet rather than traditional phone lines. The IP 650 features high-definition audio, or HD Voice, which significantly enhances the clarity of conversations. Equipped with multiple microphones, it can pick up voices from all angles within a conference room, making it suitable for meetings of varying sizes.

One of the standout features of the Polycom 650 is its ability to integrate with various business applications. It supports Microsoft Skype for Business and other collaboration tools, allowing users to connect easily and seamlessly. The device also features an intuitive user interface with backlit display and dedicated buttons for quick access to essential functions, making it easy to dial and manage calls.

On the other hand, the Polycom SoundStation IP 550 is designed for smaller conference rooms but still packs a punch with its feature set. Similar to the 650, it offers high-definition voice quality, ensuring that conversations are crystal clear. The IP 550 is compatible with a variety of SIP-based VoIP platforms, providing flexibility for businesses looking to integrate their communications systems.

Both the Polycom 650 and 550 models come equipped with features such as call management functionalities, support for Bluetooth connectivity, and the ability to connect to mobile devices. This functionality allows participants to join meetings conveniently, whether they are in the conference room or working remotely.

The build quality of both devices is robust, designed to withstand the rigors of daily use in busy office environments. The sleek and professional design fits well into any office decor, reinforcing the branding of businesses that prioritize quality communication.

In summary, the Polycom 650 and 550 conference phones are powerful tools for enhancing business communication. With their advanced audio technologies, compatibility with various platforms, and user-friendly features, these devices are essential for any organization looking to improve its conferencing capabilities. The impressive sound quality, reliability, and ease of use make them ideal choices for businesses of all sizes.