voip:debug digium

# dahdi_hardware
pci:0000:04:00.0     wct4xxp+     d161:0410 Wildcard TE410P (4th Gen)

pri set debug on span 2
TEI=0 Got SABME from network peer.
TEI=0 Sending UA
TEI=0 Sending SABME
TEI=0 Sending SABME
TEI=0 Got SABME from network peer.
TEI=0 Sending UA
TEI=0 Sending SABME
TEI=0 Got SABME from network peer.
TEI=0 Sending UA
TEI=0 MDL-ERROR (G): T200 expired N200 times sending SABME in state 5(Awaiting establishment)
Changing from state 5(Awaiting establishment) to 4(TEI assigned)
q931.c:7700 q931_dl_indication: link is DOWN

Apanya ya ? sebelumnya pakai 420 dengan konfig yang sama normal.
hardware error atau distro error ?
belum dapat clue