Configure SIP trunk for G711ulaw codec only

[AntBan]

System information:
MDSH> ts_about;
====== MX-ONE Telephony System ======
Version: 3.2 SP1 build16
RPM Packages
============
Telephony Server 12.45.6 :
eri_sn-12.45.6-MR
Media Gateway File system 2.0 :
egx_rfs-2.0-1
Media Gateway 10.15 :
egx_sw-10.15-1
Media Gateway Classic 1.4_5 :
lsue_sw-1.4_5-1
Manager 8.48.1 :
eri_om-8.48.1-1

I configured sip trunk to destination (172.20.214.254) and would like to force G711ulaw as the only codec for both outgoing and incoming calls. But using the RIANC does not give option to enable the SIP trunk for only one Codec. Also changing the order using the RIANC does not update the order in the INVITE of SIP messages. Can some one please help?.

Find below the SIP trunk configuration:
MDSH> sip_route -print -route 15
Route data for SIP destination

Route : 15
Protocol = udp
Invite URI string 0 = sip:?@172.20.214.254
Invite URI string 1 =
Invite URI string 2 =
Invite URI string 3 =
Invite URI string 4 =
Invite URI string 5 =
Invite URI string 6 =
Invite URI string 7 =
From URI string 0 =
From URI string 1 =
From URI string 2 =
From URI string 3 =
From URI string 4 =
From URI string 5 =
From URI string 6 =
From URI string 7 =
Port = default
Accepted calls = ALL
Priority = 255
Match this =
context B-party 0 =
context B-party 1 =
context B-party 2 =
context B-party 3 =
context B-party 4 =
context B-party 5 =
context B-party 6 =
context B-party 7 =
context A-party 0 =
context A-party 1 =
context A-party 2 =
context A-party 3 =
context A-party 4 =
context A-party 5 =
context A-party 6 =
context A-party 7 =
Authentication username =
Password =
Registration type = NO_REG
Trusted privacy domain = no
SOS a subscriber number =
SOS type of number =
SOS destination number =



MDSH> rocap:rou=15;
ROUTE CATEGORY DATA
ROU SEL TRM SERV NODG DIST DISL TRAF SIG BCAP
15 7110000000000010 4 3110000001 0 30 128 00151515 1111111000A1 001100

END



MDSH> rodap:rou=15;
ROUTE DATA
ROU TYPE VARC VARI VARO FILTER
15 TL66 H'00000000 H'00000000 H'00000111 NO

END

MDSH> rianp:rou=15;
H.323 ROUTE DATA
ROU IP ADDRESS LROUID RROUID CODECS
15 172.20.214.254 AC0123456789B

END