Hi Liuxin, On Thursday 8 Jul, 2010, at 2:13 PM, liuxin wrote: > Hi all experts, > > > Now, I am using asterisk + zaptel + ss7 on my centos system. But > after > start asterisk, i always got the error on CLI console. > -------------------------------------------------------------------------------------------------------------- > *CLI> [Jul 10 03:59:40] WARNING[6445]: mtp.c:953 timeout_sltm_t1:* > No SLTA > received within Q.707 timer T1, trying again on link 'l1'.* You can try with "sltm => no" on your [link-l1] section ? It may help... Regards, - vma .