Toshiba Release 4.0 manual Modifying Strata CS IP codecs

nSend inbound calls to. Select the auto attendant, user or IVR Plug-in that answers all inbound voice calls on the trunks in this span.

3.Click the Trunks tab to specify how trunks in this span are used:

nAccept inbound calls. If checked, the trunks are used for inbound calls.

nAllow outbound calls. If checked, the trunks are used for outbound calls.

4.Click the Codecs tab to view the default codecs used by this span for all inbound calls and as dialing service defaults for outbound calls. If you must change Strata CS’s default codec list, see the next section, “Modifying Strata CS IP codecs.”

Note: You can override the default span codecs when you set up a dialing service that allocates trunks in this span (see “Codecs tab” on page 8-21).

5.Click OK to add the span to your configuration.

Modifying Strata CS IP codecs

A codec is a protocol used to compress and decompress voice signals for transmission over an IP network. When an IP call is established between two devices, the devices automatically choose which codec to use. This choice is based on whether the codec is available to both devices and how highly the codec is preferred by both. This tab lets you make codecs available to your device, and arrange them in order of preference, with the topmost codec being the most preferred. For example, you may prefer one codec over another for bandwidth reasons.

Important: When you are connecting two Strata CS Servers over an IP Gateway connection, the Servers must use the same codec lists, otherwise audio failure can occur during calls. See “Connecting two Servers using IP Gateways” on page 13-7 for more information about IP Gateway connections.

The codecs you can make available are listed below. See the Known Issues in the Administrator online Help for up-to-date information about the availability of codecs.

nG.729a. Best for Strata CS-to-Strata CS connections. Offers a good balance between sound quality and bandwidth. (8.8 kbs.)

nG.711 a-law, G.711 µ-law.Supported by all H.323 gateways and terminals, but high bandwidth. (64 kbs.)

nG.723.1. Best for NetMeeting and other H.323 terminals. (5.3 kbs. or 6.3 kbs.)

nMSGSM. (13.0 kbs.)

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