AudioCodes MediaPack 114 Uživatelský manuál stáhnout pdf (Strana 323)

Version 5.6 323 November 2008

SIP User's Manual 7. IP Telephony Capabilities

 V34ModemTransportType = 0

 BellModemTransportType = 0

 Additional configuration parameters:

• CoderName

• DJBufOptFactor

• EnableSilenceCompression

• EnableEchoCanceller

Note: This mode can be used for fax, but is not recommended for modem

transmission. Instead, use the modes Bypass (refer to ''Fax/Modem Bypass

Mode'' on page 320) or Transparent with Events (refer to ''Fax / Modem

Transparent with Events Mode'' on page 323) for modem.

7.3.2.5 Fax / Modem Transparent with Events Mode

In this mode, fax and modem signals are transferred using the current voice coder with the

following automatic adaptations:

 Echo Canceller = on (or off, for modems)

 Echo Canceller Non-Linear Processor Mode = off

 Jitter buffering optimizations

To configure fax / modem transparent with events mode, perform the following

configurations:

 IsFaxUsed = 0

 FaxTransportMode = 3

 V21ModemTransportType = 3

 V22ModemTransportType = 3

 V23ModemTransportType = 3

 V32ModemTransportType = 3

 V34ModemTransportType = 3

 BellModemTransportType = 3

7.3.2.6 G.711 Fax / Modem Transport Mode

In this mode, when the terminating device detects fax or modem signals (CED or AnsAM), it

sends a Re-INVITE message to the originating device requesting it to re-open the channel

in G.711 VBD with the following adaptations:

 Echo Canceller = off

 Silence Compression = off

 Echo Canceller Non-Linear Processor Mode = off

 Dynamic Jitter Buffer Minimum Delay = 40

 Dynamic Jitter Buffer Optimization Factor = 13

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AudioCodes MediaPack 114 Uživatelský manuál Strana 323