E1 port connected to Telco works without any problem.
E1 port connected to Siemens doesn't start because is restarted as below.
No. Time Source Destination Protocol Info
1 0.000000 Remote User Local Network LAPD U P, func=SABME
2 0.000528 Local Network Remote User LAPD U F, func=UA
3 0.000717 Local Network Remote User Q.931 RESTART
4 0.099999 Remote User Local Network LAPD S, func=RR, N(R)=1
5 0.150849 Remote User Local Network Q.931 RESTART ACKNOWLEDGE
6 0.151372 Local Network Remote User LAPD S, func=RR, N(R)=1
7 2.997662 Local Network Remote User Q.931 RESTART
8 3.091613 Remote User Local Network Q.931 RESTART ACKNOWLEDGE
9 3.092027 Local Network Remote User LAPD S, func=RR, N(R)=2
10 6.997654 Local Network Remote User Q.931 RESTART
11 7.100010 Remote User Local Network LAPD S, func=RR, N(R)=3
12 7.113235 Remote User Local Network Q.931 RESTART ACKNOWLEDGE
13 7.113565 Local Network Remote User LAPD S, func=RR, N(R)=3
14 10.997071 Local Network Remote User Q.931 RESTART