Table Of Contents

Disabling Transcoding into the G.729a Audio Format

Disabling Transcoding into the G.729a Audio Format

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If you want to disable transcoding into the G.729a audio format, do the following procedure. Otherwise, continue to the "Testing the Integration" chapter.

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Caution Disabling transcoding into the G.729a audio format will block the audio stream for phones that use this audio format when connected to Cisco Unity. For the phones that use the G.729a audio format to receive the audio stream from Cisco Unity, you must set up a Cisco Unified CM transcoder to transcode the audio stream into the G.729a audio format.

When Cisco Unity has multiple integrations, disabling transcoding into the G.729a audio format will block G.729 audio streams to the Cisco Unity server for other integrations that use the G.729a audio format (for example, Cisco Unified CM SCCP integrations or integrations through PIMG units).

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To Disable Transcoding into the G.729a Audio Format

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Step 1 On the Windows Start menu, click Settings > Control Panel > Sounds and Multimedia.

Step 2 In the Sounds and Multimedia dialog box, click the Hardware tab.

Step 3 Under Devices, click Audio Codecs and click Properties.

Step 4 In the Audio Codecs Properties dialog box, click the Properties tab.

Step 5 Under Audio Compression Codecs, click Sipro Labs G.729A and click Remove.

Step 6 When prompted to confirm removing the codec, click Yes.

Step 7 If prompted to restart the system, click Restart Later.

Step 8 In the Audio Codecs Properties dialog box, click OK.

Step 9 In the Sounds and Multimedia dialog box, click OK.

Step 10 Browse to Windows\System32.

Step 11 Rename the file Sl_g729a.acm to be Sl_g729a.old.

Step 12 On the Windows Start menu, click Programs > Cisco Unity > Manage Integrations.

Step 13 In the left pane of the UTIM window, expand the Cisco Unified CM SIP trunk integration and click the first cluster.

Step 14 In the right pane, click the SIP Info tab.

Step 15 In the Preferred Codec field, confirm that the setting is G.711 (mu-law). If the field has this setting, continue to Step 16.

If this field has a different setting, do the following substeps.

a. Click G.711 (mu-law).

b. Click Save.

c. When prompted to restart the Cisco Unity services, click No.

Step 16 Repeat Step 13 through Step 15 on all remaining clusters in the Cisco Unified CM SIP trunk integration.

Step 17 Restart the Cisco Unity server.

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