Weird Issue with Channel

For the last 3 days i’ve been having a issue with inbound calls not coming in and those trying to call in are getting quick busy signal but this seems to be intermitting issue cause one minute all calls come in fine then they go busy again. After watching the CLI i found these error’s popping up every once and a while and they seem to be the issue. But since i’m a noobie to this and i inhereited this machine with the Job position i’m at a loss at what could be causing this issue. Any help would be great and i’ve listed the error’s and system specs below.

Sangoma AFT Series - A104 Quad Rev 2.1
Asterisk SVN-branch-1.2-r12927M
Using 2 Pri T1’s from Verizon

Error Message:
Jul 28 09:20:54 WARNING[9380]: chan_zap.c:8283 pri_dchannel: Restart requested on odd/unavailable channel number 1/12 on span 1
Jul 28 09:20:54 WARNING[9380]: chan_zap.c:8283 pri_dchannel: Restart requested on odd/unavailable channel number 1/13 on span 1
Jul 28 09:20:54 WARNING[9380]: chan_zap.c:8283 pri_dchannel: Restart requested on odd/unavailable channel number 1/14 on span 1
Jul 28 09:20:54 WARNING[9380]: chan_zap.c:8283 pri_dchannel: Restart requested on odd/unavailable channel number 1/15 on span 1
Jul 28 09:20:54 WARNING[9380]: chan_zap.c:8283 pri_dchannel: Restart requested on odd/unavailable channel number 1/16 on span 1
Jul 28 09:20:54 WARNING[9380]: chan_zap.c:8283 pri_dchannel: Restart requested on odd/unavailable channel number 1/17 on span 1
Jul 28 09:20:54 WARNING[9380]: chan_zap.c:8283 pri_dchannel: Restart requested on odd/unavailable channel number 1/18 on span 1
Jul 28 09:20:54 WARNING[9380]: chan_zap.c:8283 pri_dchannel: Restart requested on odd/unavailable channel number 1/19 on span 1
Jul 28 09:20:54 WARNING[9380]: chan_zap.c:8283 pri_dchannel: Restart requested on odd/unavailable channel number 1/20 on span 1
Jul 28 09:20:54 WARNING[9380]: chan_zap.c:8283 pri_dchannel: Restart requested on odd/unavailable channel number 1/21 on span 1
Jul 28 09:20:54 WARNING[9380]: chan_zap.c:8283 pri_dchannel: Restart requested on odd/unavailable channel number 1/22 on span 1
Jul 28 09:20:54 WARNING[9380]: chan_zap.c:8283 pri_dchannel: Restart requested on odd/unavailable channel number 1/23 on span 1