Echo Problem

[enktr]

Hi,
Has anyone experienced problems with ECHO on IP phones when the call is going over an analog trunk? everything is normal for internal calls...

Analog Phones,Digital Phones and Dect Phones working without echo on internal and external calls...

ROUTE CATEGORY DATA
ROU SEL TRM SERV NODG DIST DISL TRAF SIG BCAP
1 0110000000000010 4 3100000000 0 30 128 00101015 000011000000 111111

ROUTE DATA
ROU TYPE VARC VARI VARO FILTER
1 TL11 H'00000012 H'00000188 H'00002815 NO

For Analog Extensions TRM=0
For Analog Trunks TRM=4
For IP Extension TRM= ? i searched ALEX to see trm for ip ext, but did not find any.

<LSATP;
LIM SWITCH ATTENUATION (DB)
POS 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
------------------------------------------------------------------------
LIM
1 -7 -7 0 3 6 9 12 15 18 21 24 27 30 33 36 39

TRM=0 > 4 = -7
TRM=4 > 0 = -7

Any Ideas?

Best Regards

 

[enktr]

Any Idea?

 

[IPuser]

Your Tranmission settings do seem rather loud (at -7 ).

The effective TRM for IP Phones is fixed, depending on the Market. It should usually be the same as you'd use for Digital & ISDN phones, but they don't always get it right.

What Market Application system is this ?

 

[IPuser]

In fact -7 don't look like any standard LSATP value at all.
Has someone been messing with your transmission values ?

 

[enktr]

Hi,

System Informations

Market Application: Standart..
Version BC13 SP2
IP Extension board: ELU32
LIM: 1


Best Regards...

 

[IPuser]

For the Standard AS
TRM 0 -> TRM 4 and
TRM 4 -> TRM 0
should both be giving 0 dB in the LIM Switch.

That would solve your Echo problem.

Looks like someone's been messing with your Tranmission Matrix too.

Regards,

 

[enktr]

Hi IPuser,

problem solved with 0db.
do you know For IP Extension TRM ? because i have low quality volume for analog extension and cordless extension..

Best Regards...

 

[IPuser]

Hi,
Is the low quality volume for analog & cordless extensions only After correcting the Echo for IP extension ? OR was it always the same ?

How did you achieve the 0 dB, for IP ? (Was it by LSATI ? )

What's your LSATP look like now ?


Would imagine the TRM for IP Extension to be 0, same as Analogue & Cordless,

BUT need to check your Tranmission Matrix.

SACOP:LIM=x,UNIT=SCP,SECTOR=REL,ADDR=51&&90;

where x = each LIM number , in turn.
(every LIM hould be the same - but you never know, if someone's been messin' ).

Which TRM you use for cordless ? (0 ?)

Regards,