Why cme blind transfer working consultative transfer not working?

[actualabhishek]

Hello All,

Could anyone of you please suggest why consultative transfer is not working for me. When I tried to do a full-consult transfer Transferee could not able to hear the transferred person (one way audio). Blind transfer is working with no issue. 

All transfers are to internal extensions.

FYI ephone-dn are configured as dual-line

voice service voip
ip address trusted list
no ip address trusted authenticate
allow-connections h323 to h323
allow-connections h323 to sip
allow-connections sip to h323
allow-connections sip to sip
no supplementary-service h450.2
no supplementary-service h450.3
fax protocol t38 version 0 ls-redundancy 0 hs-redundancy 0 fallback none
modem passthrough nse codec g711ulaw
h323
h225 h245-address on-connec
============================================================================
telephony-service
sdspfarm units 3
sdspfarm tag 1 V43CME01-Conf
sdspfarm tag 2 V43CME01-XCODE
sdspfarm tag 3 V43CME01-MTP
no privacy
conference hardware
max-ephones 165
max-dn 170
ip source-address 10.97.200.2 port 2000
timeouts interdigit 4
timeouts busy 15
timeouts ringing 45
cnf-file location flash:
cnf-file perphone
load 7960-7940 P00308010100
load 7942 SCCP42.9-2-1S
load 7962 SCCP42.9-2-1S
time-format 24
date-format dd-mm-yy
voicemail 3000
max-conferences 8 gain -6
call-forward pattern .T
transfer-system full-consult
transfer-pattern .T
secondary-dialtone 0
create cnf-files version-stamp Jan 01 2002 00:00:00

[Mohammed Khan]

Can you confirm complete call flow?

Is this transfer to PSTN or Internal?

Is this issue intermittent?

Provide below outputs

++ show tech voice

++ show logging

[actualabhishek]

Thanks for writing Mohammed.

This is not intermittent. Blind transfer is working for all but consultative transfer is not working (one way audio)

Call flow is like this- Caller (PSTN)------>Internal Phone A----------Transferred to ------->Internal Phone B.

requested logs attached.

[Mohammed Khan]

collect below debugs for sample working and non-working call

debug voip ccapi inout
debug h225 q931
debug h225 asn1
debug h245 asn1
debug h225 events
debug h245 events
debug ephone detail
debug ccsip messages
debug sccp message
debug voip vtsp def
debug voip application callsetup
debug voip application redirect
debug voip application session
debug voip application supplementary service
debug voip application error

Provide below info,

++ IP address of the devices involved in the call flow

++ Call Detaills, Calling party, Called Party,Timestamp

++ Do you see packets increment when you press "?" button

++ Do you see packets increment in the output of "show call active voice brief"

[Mohammed al Baqari]

Please try to remove the command

h225 h245-address on-connect

[actualabhishek]

hey Mohammed,

I will try to remove above command. Also let me know if I need to configure voice rtp send-recv, because this command is not configured currently.

Many Thanks,

Abhi 

[Mohammed Khan]

Don't matter, that command is for media cut-thru.

Regards,

Mohammed Noor