Asterisk-misdn-L1 deactivated

Hi, I’m using asterisk 1.4.15 with misdn on a beronet isdn card, and I’m having the following problem:
Inbound calls are not working because L1 is deactivated. Its working for 5 minutes AFTER I MAKE an OUTBOUND CALL…I’ve spoken with some friend in the telco company, they say i must activate some option in order to keep the L1 active…

P[ 0] MGMT: SSTATUS: L1_ACTIVATED
P[ 1] MGMT: SSTATUS: L2_ESTABLISH
P[ 0] MGMT: SSTATUS: L1_DEACTIVATED
P[ 0] MGMT: SSTATUS: L1_DEACTIVATED
P[ 0] MGMT: SSTATUS: L1_DEACTIVATED

misdn.conf using this:

ntkeepcalls=no
bridging=no
l1watcher_timeout=1
pmp_l1_check=yes

Try this instead

pmp_l1_check=no

You haven’t stated whether you are using PTP or PTMP.

With PTMP ports your Telco ( at least they do in OZ ) will deactivate the L1 after about 20-30 seconds when they are inactive.