16 KHz trunks - one way speech

[TheCurious]

I have a problem with 16 KHz public trunks, during outgoing calls. Sometimes caller hears another party, but another party cannot hear the caller, and hangs up.

When MD110 does not receive 16 KHz pulses from public exchange, then bothway speech connection is not established,only one way speech. After a first received pulse speech becomes two way. Normally, the first 16KHz pulse must be transmitted when B party answers, but sometimes public exchange forgets to send it.

LSCOP:LIM=2;
LIM SWITCH MULTIPLE POSITION DATA
EQU ATTN CONNECTION STATUS CONTROLLER ADDR
A B LIM UNIT PTR
2-0-10-00 2-0-30-20 2 SERIAL 2 ELP6 H'027F
2-0-30-20 2-1-60-00 2 RESERVED NOT CONNECTED 2 ELP6 H'027F
2-1-02-07 2-1-30-29 2 TWO WAY MAIN-AUXILIARY 2 OLP1T H'0009
2-1-30-28 2-1-61-01 2 CONNECTED 2 OLP1T H'0009
2-1-30-29 2-1-02-07 2 TWO WAY AUXILIARY-MAIN 2 OLP1T H'0009
2-1-60-00 2-0-10-00 2 CONNECTED 2 ELP6 H'027F
2-1-61-01 2-1-30-28 2 CONNECTED 2 OLP1T H'0009
END

2-0-10-00 is EQU of extension
2-0-30-20 is EQU of TMU
2-1-60-00 is EQU of analog trunk

System is BC11 SP12

Hardware is:
TLU44 ROF 1375243/4 R3A
CDU2 ROF 137508/1 R2A
CDU4 ROF 137508/2 R1A

If I change route settings, and choose not to receive 16KHz pulses, than I do not have this problem. But, the customer has a billing system that requires 16 KHz pulses, so I cannot do that..
Public exchange people claim that everything is OK on their side.....

So, my question is: Does anyone know some trick how to solve this ???

The Curious

 

[TheCurious]

I forgot to say:
I have also checked NANLS and it is OK.

The Curious

 

[lancbomb]

restart the card and program unit, also check with provider.

 

[TheCurious]

Provider claims that everything is OK on their side...but when I connect telephone set with 16KHz receiver directly to telephone line, I can see that they are wrong...sometimes 16Khz pulses do not arrive.
Of course, I have tried RFPUI, RFBOI, SFCEI, RFEXI and others.....
My question is: Is there a way TO FORCE MD110 to go into a two way speech connection, WITHOUT having received proper 16 KHz pulses?

The Curious