Router#show controllers serial 0
HD unit 0, idb = 0xB16C0, driver structure at 0xB5A18
buffer size 1524 HD unit 0, V.35 DCE cable, clockrate 64000
cpb = 0x24, eda = 0xC118, cda = 0xC12C
RX ring with 16 entries at 0x24C000
00 bd_ptr=0xC000 pak=0x0B6D20 ds=0x250D10 status=80 pak_size=22
01 bd_ptr=0xC014 pak=0x0B6B70 ds=0x250658 status=80 pak_size=22
02 bd_ptr=0xC028 pak=0x0B69C0 ds=0x24FFA0 status=80 pak_size=22
03 bd_ptr=0xC03C pak=0x0B6810 ds=0x24F8E8 status=80 pak_size=279
04 bd_ptr=0xC050 pak=0x0B84C0 ds=0x256B20 status=80 pak_size=22
05 bd_ptr=0xC064 pak=0x0B8310 ds=0x256468 status=80 pak_size=22
06 bd_ptr=0xC078 pak=0x0B8160 ds=0x255DB0 status=80 pak_size=22
07 bd_ptr=0xC08C pak=0x0B7FB0 ds=0x2556F8 status=80 pak_size=22
08 bd_ptr=0xC0A0 pak=0x0B7E00 ds=0x255040 status=80 pak_size=22
09 bd_ptr=0xC0B4 pak=0x0B7C50 ds=0x254988 status=80 pak_size=22
10 bd_ptr=0xC0C8 pak=0x0B7AA0 ds=0x2542D0 status=80 pak_size=279
11 bd_ptr=0xC0DC pak=0x0B78F0 ds=0x253C18 status=80 pak_size=22
12 bd_ptr=0xC0F0 pak=0x0B7740 ds=0x253560 status=80 pak_size=22
13 bd_ptr=0xC104 pak=0x0B7590 ds=0x252EA8 status=80 pak_size=22
14 bd_ptr=0xC118 pak=0x0B73E0 ds=0x2527F0 status=80 pak_size=22
15 bd_ptr=0xC12C pak=0x0B7080 ds=0x251A80 status=80 pak_size=22
16 bd_ptr=0xC140 pak=0x0B6ED0 ds=0x2513C8 status=80 pak_size=22
cpb = 0x24, eda = 0xC828, cda = 0xC828
TX ring with 2 entries at 0x24C800
00 bd_ptr=0xC800 pak=0x000000 ds=0x268CB4 status=80 pak_size=22
01 bd_ptr=0xC814 pak=0x000000 ds=0x268CB4 status=80 pak_size=22
02 bd_ptr=0xC828 pak=0x000000 ds=0x27D498 status=80 pak_size=284
0 missed datagrams, 0 overruns
0 bad datagram encapsulations, 0 memory errors
0 transmitter underruns
0 residual bit errors