E1 connection through coax

[emags]

i have change my E1 with PSTN from twisted pair to coax cable. but since then i have been receiving this alrm '300 DIGITAL TRUNK,SEIZE ACKNOWLEDGE NOT RECEIVED' and blocking the link.

STATUS INFORMATION AT 11:09:58 03DEC08
ROU TRU TYPE TRAFFIC STATE/PTR LINE STATE/PTR ADD INFO
34 002-1 TL30 IDLE #0059 BLOCKED #00E9
34 002-2 TL30 IDLE #0058 BLOCKED #00E8
34 002-3 TL30 IDLE #0057 BLOCKED #00E7
34 002-4 TL30 IDLE #0056 BLOCKED #00E6
--
--
--
my configuration is as follow;
<RODAP:ROU=34;
ROUTE DATA
ROU TYPE VARC VARI VARO FILTER
34 TL30 H'00000000 H'0000223A H'00000156 NO

END

<ROCAP:ROU=34;
ROUTE CATEGORY DATA
ROU SEL TRM SERV NODG DIST DISL TRAF SIG BCAP
34 7110000000000010 5 3000000011 0 30 128 00020212 011110010050 001100

END


Could anyone help what is wrong with this?

 

[dstrang1]

If everything was working fine before you changed the cabling, then you have an issue with the new cable.

Good luck,

Dave Strang

 

[kank]

Is there more alarms like code 269, 268 etc.?

 

[TeleLion]

The impedance is diffrent from Coax to twisted pair, how are you connecting/terminating the coax cable into your trunk board? you might trying using a coax to twisted pair converte:

http://www.data-connect.com/RAD_BE-1.htm

TELEC3

 

[ceejay55]

Are you using TLU76? 120 ohm connector is the bottom one and co-ax is the next one up-actually written on the PCB
Craig

 

[emags]

1. the old connection with twisted pair was through LTU-2 which becoame fault. now we're connectn' to their E1 through their digital multiplex (optical). Do they need to adjust response time?

2. apart from 300, another alarms is
CLASS: 3
271 DIGITAL TRUNK, RECEIVED ALARM FROM REMOTE END
DATE TIME ALP NOIF UNIT EQU BRDID INF1 INF2

3. my coax cable is connected to second port from bottom where it is suppose to be. Are saying that I should try to connect to a twisted pair port?

 

[cfrei]

Alarm 271 means, that opposite equipment can't see your transmit. Transmit FROM this eq. to MD is OK.

Use LED for test of your transmit.

 

[kank]

Most multiplexers have G703 type ports for E1 connection which is 120 Ohm. Try the bottom port.