OK, got a pairing request from my phone app to one of my receivers :
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<s:Body><u:X-pairingRequest xmlns:u="urn:schemas-upnp-org:service:X-CTC_RemotePairing:1">
<pairingDeviceID>48428DF184BE995392604E1D63DEEC4E</pairingDeviceID>
<friendlyName>PHONE:Hans-Jörgs iPhone 5s</friendlyName>
<userID>48089EBF652F2F622E36914997DF03B6</userID>
</u:X-pairingRequest>
</s:Body>
</s:Envelope>
Entering the userID from above into your script, I get
entertain_control.sh log on
Telekom Entertain Control
192.168.0.112:49154 -> 192.168.0.55:49152; local MAC=B8:AE:ED:70:16:25
nc: Address already in use
Send pairing request (pairingDeviceID='ADA7A411BB1FD7A406F0AACE1C840A7E', friendlyName='oh-pi', userID='48089EBF652F2F622E36914997DF03B6')
Result=0
Waiting for Pairing Code...
Unable to get pairingCode!
OFF
The failure is not related to
nc: Address already in use
cause also tried on a different machine without any UPnP services active, so got
Telekom Entertain Control
192.168.0.48:49154 -> 192.168.0.55:49152; local MAC=B8:27:EB:EF:57:43
Listening on [0.0.0.0] (family 0, port 49154)
Send pairing request (pairingDeviceID='E521AD6DD8DF7868FED921B5BF396041', friendlyName='oh-pi', userID='48089EBF652F2F622E36914997DF03B6')
Result=0
Waiting for Pairing Code...
Unable to get pairingCode!
OFF
request_pair.log
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"><s:Body>
<u:X-pairingRequestResponse xmlns:u="urn:schemas-upnp-org:service:X-CTC_RemotePairing:1">
<result>0</result>
</u:X-pairingRequestResponse>
</s:Body> </s:Envelope>
Hope that helps.