How to i manipulate the Contact Header in SIP INVITE to match registration?

[timlytle]

I am using a TA908e, converting SIP to PRI,      SIP trunk  to Softswitch requires registration,  the trunk registers but calls fail,     The issue is that the INVITE for Registration has contact header with the proper information, the INVITE for the Call has the calling number in the contact header, the Softswitch can not associate that contact headed to the registered account and fails the call  

How can i change the Contact header on this trunk to always supply the auth-name and not the calling number information.    I do not want to change the To and from headers

voice trunk T10 type sip

  description "SIP_245 SIP Connection to Voice Access Network for PRI"

  sip-server primary x.x.x.x

  registrar primary x.x.x.x

  outbound-proxy primary x.x.x.x

  dial-string source to

  register 123456 auth-name 123456 password "passowrd"

  codec-list Default_List both

  authentication username 123456 password "password"

Registration

REGISTER sip:x.x.x.x:5060 SIP/2.0

From: <sip:123456@x.x.x.x:5060;transport=UDP>;tag=4fa49cd8-7f000001-13c4-2419-32d8c585-2419

To: <sip:123456@x.x.x.x:5060;transport=UDP>

Call-ID: 4fb1d010-7f000001-13c4-2419-6163690d-2419

CSeq: 1 REGISTER

Via: SIP/2.0/UDP y.y.y.y:5060;branch=z9hG4bK-2419-8d021b-73d65b5f

Max-Forwards: 70

Supported: 100rel,replaces

Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, PRACK, REFER, REGISTER

User-Agent: ADTRAN_Total_Access_908e_3rd_Gen/R13.2.2.E

Contact: <sip:123456@y.y.y.y:5060;transport=UDP>

Expires: 3600

Content-Length: 0

Outbound Call

INVITE sip:8125551111@x.x.x.x:5060 SIP/2.0

From: <sip:8125552222@x.x.x.x:5060;transport=UDP>;tag=4fa9b408-7f000001-13c4-2b0c-2109aaae-2b0c

To: <sip:8125551111@x.x.x.x:5060>

Call-ID: 4fad9b28-7f000001-13c4-2b0c-519356f9-2b0c@x.x.x.x

CSeq: 1 INVITE

Via: SIP/2.0/UDP y.y.y.y:5060;branch=z9hG4bK-2b0c-a82941-290cb9cb

Max-Forwards: 70

Supported: 100rel,replaces

Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, PRACK, REFER, REGISTER

User-Agent: ADTRAN_Total_Access_908e_3rd_Gen/R13.2.2.E

Contact: <sip:8125552222@y.y.y.y:5060;transport=UDP>

Content-Type: application/sdp

Content-Length: 257

[azbrewsky]

You will need to change the PAI in your outbound trunk.

!

!

voice trunk T01 type sip

  description "Description - not really needed here"

  sip-server primary <ip of carrier> udp 5060

  domain "voip.carrier.com"

  max-number-calls 50

  hmr Trunk1_Outbound out

  register 6027821177 auth-name "<registration ID" password encrypted "<registration password>"

  trust-domain

  codec-list G711 both

  grammar from host domain

  grammar p-asserted-identity host domain

  grammar to host domain

  authentication username "<registration ID" password encrypted "<registration password>"

  transfer-mode network

!

!

hmr policy Trunk1_Outbound

  rule-set Add_PAI_Trunk1 10

!

!

hmr rule-set Add_PAI_Trunk1

  message-rule Initialize_Variables message-type request 10

    set private-variable Add_PAI  new-value false  10

  message-rule Remove_Existing_PAI message-type any 15

    remove header p-asserted-identity position all  10

  message-rule Check_For_PAI_Candidates message-type request 20

    set private-variable Add_PAI  header sip-req-uri position first match-value "/^INVITE /" new-value true  10

  message-rule Add_PAI_If_Needed message-type request 30

    match private-variable Add_PAI match-value true

    add header p-asserted-identity position first new-value /<sip:%public.Privacy_Prefix_1%>/  10

!

!

hmr set public-variable Privacy_Prefix_1 new-value "<sip registration number>@voip.carrier.com"