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NM HDV2 1T1/E1 - Layer 1 is Active and Layer 2 - TEI _ASSIGNED

The carrier terminated the line on a Chrone Block and gave me the pin-outs on that punch-down block.

So I made up a cable and connected that cable from that Chrone Block to the Rj45.

With the following outputs, can I assume my cable pin-outs and connections are fine, because otherwise even layer 1 won't become ACTIVE. Or could I still have a cabling issue with TX+, TX-, TX= and Rx-?

sho controller e1

E1 1/0 is up.

Applique type is Channelized E1 - balanced

No alarms detected.

alarm-trigger is not set

Version info Firmware: 20040802, FPGA: 255, spm_count = 0

Framing is CRC4, Line Code is HDB3, Clock Source is Line.

Current port master clock:recovered from backplane

Data in current interval (436 seconds elapsed):

8349 Line Code Violations, 6 Path Code Violations

20 Slip Secs, 0 Fr Loss Secs, 1 Line Err Secs, 0 Degraded Mins

19 Errored Secs, 0 Bursty Err Secs, 1 Severely Err Secs, 65 Unavail Secs

snovoicertr02#sho isdn sta

Global ISDN Switchtype = primary-net5

%Q.931 is backhauled to CCM MANAGER 0x0003 on DSL 0. Layer 3 output may not apply

ISDN Serial1/0:15 interface

dsl 0, interface ISDN Switchtype = primary-net5

L2 Protocol = Q.921 0x0000 L3 Protocol(s) = CCM MANAGER 0x0003

Layer 1 Status:

ACTIVE

Layer 2 Status:

TEI = 0, Ces = 1, SAPI = 0, State = TEI_ASSIGNED

Layer 3 Status:

0 Active Layer 3 Call(s)

Active dsl 0 CCBs = 0

The Free Channel Mask: 0xFFFF7FFF

Number of L2 Discards = 0, L2 Session ID = 10

Total Allocated ISDN CCBs = 0

snovoicertr02#sho int s1/0:15

Serial1/0:15 is up, line protocol is up (spoofing)

Hardware is DSX1

MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation HDLC, loopback not set

Last input never, output never, output hang never

Last clearing of "show interface" counters 00:07:28

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 0/0/256 (active/max active/max total)

Reserved Conversations 0/0 (allocated/max allocated)

Available Bandwidth 48 kilobits/sec

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

0 packets input, 0 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

0 packets output, 0 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

2 carrier transitions

snovoicertr02#sho isdn sta

Global ISDN Switchtype = primary-net5

%Q.931 is backhauled to CCM MANAGER 0x0003 on DSL 0. Layer 3 output may not apply

ISDN Serial1/0:15 interface

dsl 0, interface ISDN Switchtype = primary-net5

L2 Protocol = Q.921 0x0000 L3 Protocol(s) = CCM MANAGER 0x0003

Layer 1 Status:

ACTIVE

Layer 2 Status:

TEI = 0, Ces = 1, SAPI = 0, State = TEI_ASSIGNED

Layer 3 Status:

0 Active Layer 3 Call(s)

Active dsl 0 CCBs = 0

The Free Channel Mask: 0xFFFF7FFF

Number of L2 Discards = 0, L2 Session ID = 10

Total Allocated ISDN CCBs = 0

snovoicertr02#sho isdn sta

Global ISDN Switchtype = primary-net5

%Q.931 is backhauled to CCM MANAGER 0x0003 on DSL 0. Layer 3 output may not apply

ISDN Serial1/0:15 interface

dsl 0, interface ISDN Switchtype = primary-net5

L2 Protocol = Q.921 0x0000 L3 Protocol(s) = CCM MANAGER 0x0003

Layer 1 Status:

ACTIVE

Layer 2 Status:

TEI = 0, Ces = 1, SAPI = 0, State = TEI_ASSIGNED

Layer 3 Status:

0 Active Layer 3 Call(s)

Active dsl 0 CCBs = 0

The Free Channel Mask: 0xFFFF7FFF

Number of L2 Discards = 0, L2 Session ID = 10

Total Allocated ISDN CCBs = 0

1 REPLY

Re: NM HDV2 1T1/E1 - Layer 1 is Active and Layer 2 - TEI _ASSIGN

"show isdn status" output says that Layer 1 is ACTIVE, so i feel there is no issue at physical layer.

However, Layer 2 of interface Serial1/0:15 is not in 'MULTIPLE_FRAME_ESTABLISHED'

state.

Make sure that your service provider's switch type is primary-net5. If not, modify your switch type accordingly.

The interface-specific ISDN switch setting will override the global switch setting.

Also Verify the T1/E1 is configured to match the provider's switch. To see the layer 2 negotiations between the switch and the router, use the privileged exec command 'debug isdn q921'

HTH, rate if it does ....

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