Bit rate error when trying to dial out to an ISDN line using Polycom XML API - api

Question

I am having a problem connecting to an ISDN line using Polycom's XML API on an RMX_2000. Below is the request I am sending, and the response. I can do the same action from the RMX Manager, for the same number, in the same conference, and it works. When I trace the XML from the RMX Manager, I get an ADD_PARTY request that looks exactly like my constructed request, except with a lot more elements. I've reviewed and don't see any that seem like they could be relevant, and I am loath to manually code every single element, knowing that it is a long shot that it will even help. The same request (variant) works fine for IP and registered number requests, but no matter what I do, always get the bit rate error below. Can anyone tell me what I am doing wrong?
<TRANS_CONF_1>
<TRANS_COMMON_PARAMS>
<MCU_TOKEN>304</MCU_TOKEN>
<MCU_USER_TOKEN>304</MCU_USER_TOKEN>
<MESSAGE_ID>1</MESSAGE_ID>
</TRANS_COMMON_PARAMS>
<ACTION>
<ADD_PARTY>
<ID>18466</ID>
<PARTY>
<ID>0</ID>
<NAME>isdn</NAME>
<PHONE_LIST>
<PHONE1>12345678910</PHONE1>
</PHONE_LIST>
<INTERFACE>isdn</INTERFACE>
<CONNECTION>dial_out</CONNECTION>
<MEET_ME_METHOD>party</MEET_ME_METHOD>
<NUM_TYPE>taken_from_service</NUM_TYPE>
<MULTI_RATE>auto</MULTI_RATE>
<ALIAS>
<NAME>12345678910</NAME>
<ALIAS_TYPE>323_id</ALIAS_TYPE>
</ALIAS>
<VIDEO_BIT_RATE>automatic</VIDEO_BIT_RATE>
<ENHANCED_VIDEO>false</ENHANCED_VIDEO>
<UNDEFINED>false</UNDEFINED>
</PARTY>
</ADD_PARTY>
</ACTION>
</TRANS_CONF_1>
Here is the response:
<RESPONSE_TRANS_CONF>
<RETURN_STATUS>
<ID>1015</ID>
<DESCRIPTION>Conference bit rate must be set to a minimum of 128Kbps to enable ISDN participant connection</DESCRIPTION>
<YOUR_TOKEN1>0</YOUR_TOKEN1>
<YOUR_TOKEN2>0</YOUR_TOKEN2>
<MESSAGE_ID>1</MESSAGE_ID>
<DESCRIPTION_EX></DESCRIPTION_EX>
</RETURN_STATUS>
<ACTION>
<ADD_PARTY/>
</ACTION>
</RESPONSE_TRANS_CONF>

Answer 1

Thanks to a little help from someone at Polycom, I found out that the following node is required for this:
auto
I added that to the PARTY node, and now all is well.

Answer 2

After alot of troubleshooting and wiresharking on this error I found a combination of 2 properties being the issue
Reservation object needs
<TRANSFER_RATE>384</TRANSFER_RATE>
Party object needs
<NET_CHANNEL_NUMBER>auto</NET_CHANNEL_NUMBER>