Cisco 7204 with PA-4E1G-120 interface to RAD Megaplex 2100

[froug]

I need some help setting up a fractional E1 link.
This is my H/W config

Cisco 7204/PA-4E1G-120 to RAD Megaplex 2100 --------------RAD FCD-2L to Cisco 2621/WIC-2A/S

The 7204 side is set up with the default G.703 unframed operation, clock source line. When connected to the RAD equipment I get good DCD and the LA (local alarm)LED on the card is out. However my line protocol is always down.
That's problem number 1
The 2621 side is set up to match the RAD FCD-2l converter, but I don't get a link and my line protocol is always down
Any suggestions
Thanks

 

[routerman]

Is the E1 link up between the RAD devices, any alarms displayed?
Is the Megaplex to FCD link via a service provider or is it over your own cables? if its over your own cables then this may be a clocking issue on the link.

The maximum speed of the WIC-2A/S is 128K, what speed link are you setting up?

 

[froug]

As of now we have installed 7204 routers with PA-4E1G-120 interfaces at both sides of the E1 to do tests. The E1 is private provided by our customer. As per their configuration on the RAD equipment I have configured the G703 interface as unframed (no timeslot), clock source line, (clock retrieved from Data), encapsulation hdlc, disabled CRC4. As mentionned previously my DCD status is up but my line protocol is always down. As a test I looped TX to RX on two channels on my PA-4E1G-120 G703 interface and my line protocols come right up.
Am I missing something else in the configuration to make it compatable with the RAD equipment
Here's a capture of the status of my serial interface:

C3ROUTER(boot)#sh int serial 1/0
Serial1/0 is up, line protocol is down
Hardware is 4ME1-BAL
Internet address is 10.102.130.220/24
MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, crc 16, loopback not set
Keepalive set (10 sec)
Restart-Delay is 0 secs
Last input 01:56:29, output 00:00:09, output hang never
Last clearing of "show interface" counters never
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 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
1076 packets input, 85052 bytes, 0 no buffer
Received 0 broadcasts, 1 runts, 10 giants, 0 throttles
107 input errors, 105 CRC, 0 frame, 2 overrun, 0 ignored, 0 abort
15911 packets output, 457483 bytes, 0 underruns
0 output errors, 0 collisions, 35 interface resets
0 output buffer failures, 0 output buffers swapped out
126 carrier transitions
0 alarm indications, 0 remote alarms, 0 rx LOF, 0 rx LOS
DCD up, BER inactive, NELR inactive, FELR inactive

Appreciate the help

 

[routerman]

Can you apply a local loop on the RAD to see if the locally attached router comes up? Do this at both ends.

If that works can you get a remote loop applied at the far end to send data from a local router over the E1 and back again? If this isnt possible then can you get the TX/RX coax interfaces looped at a the remote end, look at the local router to see if the link comes up in a loop state.

I take it the RAD link is running at 2.048 meg, and is also not a fractional type link?

 

[froug]

According to the person who configured the interface the RAD mux is set unframed at 64Kbps as an E0 line (an expression I've never heard before).
I scoped the lines this afternoon and it's obvious that the frequency of the signal he is giving me is slower than the TX lines from the G703 interface itself, that I use to loop back. Can I set the speed to match the incoming signal. Since the clock source is set to line I would think it would sync on the incoming clock
I saw the "bandwidth" command and set it to 64 but that did not change anything.

Appreciate your help

 

[routerman]

Thats the problem then, the G702 interface on the router needs to see a 2.048Meg clock, it wont run at 64k.

The clock option is used to phase lock the line siganl to the internal clock on the router interface card. There are various options available but all they do is lock one clock to another. They have to be 2.048 Meg +/- 50 parts per million I seem to recall.

I've just had a look in my transmission book, I've never heard of E0 either, the CEPT designation starts at E1 2.048Mbps, but there is a DS0 designation which is 64K.

I'm not sure what to suggest if your presented with G703 BNC interface at 64k, possibly use a balun and something like a WIC-1T interface card. It seems a bit of an odd combination to me.