No internet access from Cisco 1601R

I can ping the Cisco router from the internet, I can even ping the
Serial port from the internet, but connecting a cross over cable to my
laptop, yields no internet. The T1 connection I inherited consists of
a T1 line coming in to a Kentrox DataSmart 656. The DataSmart connect
to the Cisco via an h54 serial cable.

Here is a print out of the interfaces:
Ethernet0 is up, line protocol is up
Hardware is QUICC Ethernet, address is 00d0.58a3.76f0 (bia
00d0.58a3.76f0)
Description: connected to EthernetLAN
Internet address is 66.173.244.233/29
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, rely 255/255, load
1/255
Encapsulation ARPA, loopback not set, keepalive set (10 sec)
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:26:26, output 00:00:02, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
3154 packets input, 233310 bytes, 0 no buffer
Received 8 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 input packets with dribble condition detected
4666 packets output, 381927 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
Serial0 is up, line protocol is up
Hardware is QUICC Serial
Description: connected to Internet
Internet address is 66.173.245.110/30
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load
1/255
Encapsulation PPP, loopback not set, keepalive set (10 sec)
LCP Open
Listen: CDPCP
Open: IPCP
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0 (size/max/drops); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/2/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
5 minute input rate 1000 bits/sec, 1 packets/sec
5 minute output rate 1000 bits/sec, 1 packets/sec
12866 packets input, 765456 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
5 input errors, 0 CRC, 5 frame, 0 overrun, 0 ignored, 0 abort
12709 packets output, 700714 bytes, 0 underruns
0 output errors, 0 collisions, 17 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up

Sending a ping to the DNS server yields this:
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 209.137.172.20, timeout is 2
seconds:
......
Success rate is 0 percent (0/5)

.

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