ZyXEL ISG50-PSTN User Guide - Page 470
Table 159, Label, Description
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Chapter 29 Extension Management Each field is described in the following table. Table 159 Batch Add SIP Extensions LABEL DESCRIPTION Batch Add SIP Peers Group Select the authority group you want these extensions to belong to. Start Number Type the first extension number for this range of extensions. Extensions can be 3-10 digits long. Step/Interval Type the value of the increment, which the ISG50 uses to create this range of extensions. Amount Type the number of extensions you want to create. The number of extensions you can create is limited by the subscription service registered on the ISG50 (see Chapter 11 on page 229). SIP Auth. Password When you create multiple SIP extensions, you automatically create SIP accounts on the ISG50. The user names for these SIP accounts are the extension numbers. The passwords for the SIP accounts are also the extension numbers. To make the passwords more secure you can add a prefix or a postfix to these extensions. For example type "1" in the Prefix field and the SIP account passwords for the SIP extensions you create become "1 + extension number". DTMF Mode You can enter up to three letters, numbers or a combination of letters and numbers in the Prefix and Postfix fields. Control how the ISG50 handles the tones that the IP phones using these extensions make when they push their buttons. One use of the tones is to distinguish between numbers when trying to dial a PSTN phone number. You should use the same mode as your VoIP service provider. The choices are: Codec • rfc2833 - Follow the RFC 2833 standard and send the DTMF tones in RTP packets. • inband - Send the DTMF tones in the voice data stream. This works best when you are using a codec that does not use compression (like G.711). Codecs that use compression (like G.729) can distort the tones. • info - Send the DTMF tones in SIP messages. Select the type of voice coder/decoder (codec) that you want this extension to use when communicating with the ISG50. The following codecs are supported by the ISG50: • G.711 alaw (typically used in Europe) • G.711 ulaw (typically used in North America and Japan) • G.729 • G.722 • G.723.1 • G.726 See Voice Codecs on page 475 for more information. When two SIP devices start a SIP session, they must agree on a codec. If these SIP extensions are assigned to videophones, you must specify the video codecs used for video calls. The ISG50 allows the following video codecs to pass through: Codec Pool • H.261 • H.263 • H.264 • MP4 See Video Codecs on page 475 for more information. This column indicates the codec types not used by this extension. You can add a codec type to be used by this extension by double-clicking it or highlighting it and hitting the Right button. 470 ISG50 User's Guide