Relatively new to telco. Client has a T1 that comes in as follows:

CO to Adtran 608

Channel
11 TG 1416-0 RTI 1574, del 3 wink
12 1416-1
13 1416-2
14 1416-3
15 1416-4
16 1416-5
17 1416-6
18 1416-7
19 1416-8
20 1416-9
21 1416-10
22 1416-11
23
24

608 to PBX
1 Trunk D-1 Wink
2 Trunk D-1 Wink
3 Trunk D-1 Wink
4 Trunk D-1 Wink
5 Trunk D-1 Wink
6 Trunk D-1 Wink
7 Trunk D-1 Wink
8 Trunk D-1 Wink
9 Trunk D-1 Wink
10 Trunk D-1 Wink
11 Trunk D-1 Wink Deleted
12 Trunk D-1 Wink Deleted
13 Internet
14 Internet
15 Internet
16 Internet
17 Internet
18 Internet
19 Internet
20 Internet
21 Internet
22 Internet
23 Internet
24 Internet

Calls come in to intermittent dead air, then a ring or to a fast busy. CTX100 has a T1 card that shows calls coming in only when they get a ring after 30-45 seconds of dead air. Calls that go to fast busy never show on the PBX. T1 has minimal ES(10 a day maybe) and ES does not necessarily correspond to dead air phenomenon. T1 card was swapped, config reloaded, etc.; no change. LEC refuses to swap T1 pairs, CLEC(Time Warner) says it's the switch but has done limited if any monitoring or call status because it's so intermittent. Client is ready to sue CLEC to void contract as this is a 9 month old problem and getting worse. PBX reboots do not fix problem, only waiting it out. Two channels(voice) were dropped last year and might correspond to the start of this problem. Might this be an issue? Would adding them to the data channels fix this? Or? Any help is appreciated.

NTU-R Provisioning

1. DSX-1 Line Buildout = 0-133 Feet
2. DSX-1/DS1 Line Code = B8ZS
3. DSX-1/DS1 Framing = ESF
4. Forced Frame Conversion = Disabled
5. Smartjack Loopback = Enabled
6. Loopback Timeout = None
7. Latching Loopback Mode = T1 (Disabled)
8. DS1 TX Level = 0 dB
9. Customer Loss Indicator = AIS
10. PRM Setting = None
11. Loop Atten Alarm Thres = 30dB
12. SNR Margin Alarm Thres = 02dB
13. Remote Provisioning = Enabled
D. Restore Factory Defaults