WIC-56/64K-CSU/DSU和NM-1CE1T1-PRI背靠背线缆及配置

天对WIC-56/64K-CSU/DSU和WIC-56/64K-CSU/DSU进行了背靠背的线缆连接及配置。
过程如下（下面简称为56K和T1）：
首先确认56K的线缆连接方式：
A：12345678
B：78345612
其中A端：
1：tx ring
2：tx tip
7：rx tip
8：rx ring
B端：
7：rx ring
8：rx tip
1：tx tip
2：tx ring
说白了就是吧12以及78对换。
线嘛，RJ45或者RJ48都可以。
插上去以后两端做如下动作：
interface serial 0/0
service.module 56k clock rate 56
service.module 56k clock source internal
ip address 10.1.1.1 255.255.255.0
encapsulation ppp
no shut
IP地址注意自己改一下，然后看到tx和rx都起来了，cd也起来了，ping一下，通了！
顺便解释一下灯的含义：
TD Data is being transmitted to the Data Terminal
Equipment (DTE) interface.
RD Data is being received from the DTE interface.
LP The internal DSU/CSU is in loopback mode. Solid
illumination any time a loopback is active.
AL One of these alarm conditions is present: no receive
signal, loss of frame signal from the remote station, or
out of service signal from the remote station. This LED
is off during normal operation.
CD The internal DSU/CSU in the WAN interface card is
communicating with another DSU/CSU.
show一下接口的情况：

Serial0/0 is up, line protocol is up
Hardware is GT96K with 56k 4-wire CSU/DSU
Internet address is 10.1.1.1/24
MTU 1500 bytes, BW 56 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Open
Open: CDPCP, IPCP, loopback not set
Keepalive set (10 sec)
Last input 00:00:01, output 00:00:01, output hang never
Last clearing of "show interface" counters 02:01:00
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/16 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 42 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
1309 packets input, 60544 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
1309 packets output, 59773 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 output buffer failures, 0 output buffers swapped out
2 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
搞定。

下面来看看t1怎么弄：
线缆：
A端：12345678
B端：45312678
其中A端：
1：rx（in）
2：rx（in）
4：tx（out）
5：tx（out）
B端：
4：tx（in）
5：tx（in）
1：rx（out）
2：rx（out）
这样就做好了，插上去，一开始是不会亮的。
接下来我们按照T1的标准配：
1. enable
2. configure terminal
3. card type t1 slot
4. controller t1 slot/port
5. linecode {ami | b8zs}
6. framing {sf | esf}
7. clock source {line | internal}
8. pri-group [timeslots range]
9. exit
10. copy running-config startup-config
然后show一下controller：
T1 1/0 is up.
Applique type is Channelized T1
Cablelength is long gain36 0db
No alarms detected.
alarm-trigger is not set
Framing is ESF, Line Code is B8ZS, Clock Source is Line.
Module type is Channelized E1/T1 PRI
Version info Firmware: 0000001D, FPGA: 0
Hardware revision is 0.0 , Software revision is 29
Protocol revision is 1
number of CLI resets is 0
receive remote alarm : 1,
transmit remote alarm : 0,
receive AIS alarm : 0,
transmit AIS alarm : 0,
loss of frame : 1,
loss of signal : 0,
Loopback test : 0,
transmit AIS in TS 16 : 0,
receive LOMF alarm : 0,
transmit LOMF alarm : 0,
MIB data updated every 10 seconds.
Data in current interval (513 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Total Data (last 6 15 minute intervals):
0 Line Code Violations, 7 Path Code Violations,
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 50 Unavail Secs
看灯好像也都是正常的，亮了T1和cd，不知道是不是这样就行了，吼吼~
有些地方还没弄懂，慢慢了解吧。

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