H323 – ATA fax passthrough setting – recommendations

Posted: May 27, 2006 by sankar in Analog, ATA186, Fax

Audiomode – 0x00150015

0000 0000 0001 0101 (last 4 hex digits represents phone 1)

Bit 0 – 1 enables VAD

Bit 2 – 1 enables fax CED tone detection

Connect mode : 0x90000400

1001 0000 0000 0000 0000 0100 0000 0000

Bits 12 – 8 represent NSE payload type offset. Default NSE payload type is 100 for ATA which means the offset is set to 4 (00100). IOS H323/SIP gateways use NSE payload type 100. Most MGCP gateways using 6608 uses NSE payload type 101. So set the offset to 5 (00101) if setting up fax between ATA and 6608 (older versions)

Bits 13 – default 0 – represents fax pass through codec. 0 means g711ulaw, 1 means g711alaw.

To use fax in countries other than US, set

Connect mode : 0x90002400
**** key things to remember about interoperability of various AVVID fax components******

If a VG248, Cisco IOS router, MGCP gateway and ATA 186 is involved in faxing. Then set the NSE payload type to 100 (IOS Mode) in all devices. In VG248 set to IOS mode. In router by default NSE payload type is 100 (for modem passthrough). In MGCP IOS gateway (need to check). In 6608 set the mode to IOS mode. In ATA 186, default NSE payload type is 96 + offset of 4 = 100.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s