Cisco WAN :: Fails In Production Network ADTRAN 1224R

This is a real world project. A Cisco 1700  series router will be installed at one location and a ADTRAN 1224R  router will be installed on the other side. I’d like to test it before  installing at client-side by using a Cisco 2800 and the ADTRAN mentioned  above. I made a T1 crossover cable and CD led is green on 1DSU-T1 V2 of  2800.
 
I believe something is wrong with clocking. I used service-module t1 clock source internal command on 2800 to provide clocking and set ADTRAN clocking to Line BUT If I reboot the ADTRAN, while debugging service-module on 2800,  I can see this:SERVICE_MODULE(Serial0/1/0):Unit has no clock [complete output is below].
 
And even if I swap clocking sources,  still get the same output on 2800 as above.PPP requests sent from either sides are not acknowledged. [output below]

I get Se0/1/0 PPP: Authorization required every a few seconds on 2800. [output below]
 
Cisco 2800 (hostname MEE_KC)
 
1. sh run
 
username MEE_GF password 0 w1ll0w
interface Serial0/1/0
ip address 100.100.100.1 255.255.255.252
encapsulation ppp
service-module t1 clock source internal
service-module t1 fdl ansi
ppp authentication chap pap
 
2. sh int s0/1/0
Serial0/1/0 is up,
line protocol is down
Hardware is GT96K with integrated T1 CSU/DSU
Internet address is 100.100.100.1/30
[Code].....