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MD1 Impedance

MD1 Impedance

Created: Jul 21, 2020 16:59:26Latest reply: Aug 15, 2021 05:52:18 493 8 0 0 0
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Hello,


I have a MD1 (TNF1MD1A) card installed with 75 Ohm cable but in card properties it shows Impedance 120 Ohm and the field is read only. How can I change it?

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(1) (0)
liqiang185
Admin Created Jul 22, 2020 03:49:12

Dear friend! 

The external interface of the MD1 board is 120 ohms. You may have converted the 120 ohms to the 75 ohms. Therefore, the 75 ohms is used. If it works, you can ignore it.

1

Thanks!

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user_4237671
user_4237671 Created Aug 15, 2021 05:52:04 (0) (0)
 

Recommended answer

(0) (0)
wissal
MVE Created Jul 21, 2020 17:34:13

Hello,

The MD1 receives and transmits 32xE1 signals and it provides thirty-two 75-ohm/120-ohm E1 ports as shown in the table1.

Table 1 lists the functions and features that the MD1 supports.

Table 1 Functions and features that the MD1 supports
Function and FeatureDescription
Basic functionsReceives and transmits E1 signals.
E1 service categories

Supports the following E1 service categories:

  • CES E1

Port specificationsProvides thirty-two 75-ohm/120-ohm E1 ports.
Fractional E1Supports transparent service transmission at the 64 kbit/s level.
CESMaximum number of services32
Encapsulation mode

Supports the following encapsulation modes:

  • CESoPSN

  • SAToP

Service categoryPoint-to-point services
Compression of vacant slotsSupported (applicable to CESoPSN only)
Jitter buffering time (us)375-16000
Packet loading time (us)125-5000
CES ACRNot supported
RetimingSupported
Maintenance featuresLoopbackSupports inloops and outloops at E1 tributary ports.
Cold reset and warm resetSupported (with warm resets having no impact on services)
PRBS tests at E1 portsSupported
NOTE:

Supports PRBS tests only in UNI direction but not in NNI direction.

Board manufacturing information querySupported
Board power consumption information querySupported


detail : https://support.huawei.com/hedex/hdx.do?lib=EDOC1100072441AEI0322V&docid=EDOC1100072441&lang=en&v=05&tocLib=EDOC1100072441AEI0322V&tocV=05&id=EN-US_CONCEPT_0157919533&tocURL=resources/1800v/hd/pkg/md1/md1.html&p=t&fe=1&ui=3&keyword=MD1%2B%2B


Thanks

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jahangirgp
jahangirgp Created Jul 22, 2020 02:36:16 (0) (0)
Which Device/Device type/platform does belongs to MD1 card?  
wissal
wissal Reply jahangirgp  Created Jul 22, 2020 05:00:34 (0) (0)
Please open the link:
https://support.huawei.com/hedex/hdx.do?lib=EDOC1100072441AEI0322V&docid=EDOC1100072441&lang=en&v=05&tocLib=EDOC1100072441AEI0322V&tocV=05&id=EN-US_CONCEPT_0157919533&tocURL=resources/1800v/hd/pkg/md1/md1.html&p=t&fe=1&ui=3&keyword=MD1%2B%2B  
user_4237671
user_4237671 Created Aug 15, 2021 05:52:11 (0) (0)
 
All Answers
(0) (0)
2#
HAzcanio
HAzcanio Moderator Created Jul 21, 2020 17:02:11

Hi @emeliss ,


Thanks for your question in the Support Forum.


One of our experts will answer you soon.


Regards,


HAzcanio

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3#
wissal
wissal MVE Created Jul 21, 2020 17:34:13

Hello,

The MD1 receives and transmits 32xE1 signals and it provides thirty-two 75-ohm/120-ohm E1 ports as shown in the table1.

Table 1 lists the functions and features that the MD1 supports.

Table 1 Functions and features that the MD1 supports
Function and FeatureDescription
Basic functionsReceives and transmits E1 signals.
E1 service categories

Supports the following E1 service categories:

  • CES E1

Port specificationsProvides thirty-two 75-ohm/120-ohm E1 ports.
Fractional E1Supports transparent service transmission at the 64 kbit/s level.
CESMaximum number of services32
Encapsulation mode

Supports the following encapsulation modes:

  • CESoPSN

  • SAToP

Service categoryPoint-to-point services
Compression of vacant slotsSupported (applicable to CESoPSN only)
Jitter buffering time (us)375-16000
Packet loading time (us)125-5000
CES ACRNot supported
RetimingSupported
Maintenance featuresLoopbackSupports inloops and outloops at E1 tributary ports.
Cold reset and warm resetSupported (with warm resets having no impact on services)
PRBS tests at E1 portsSupported
NOTE:

Supports PRBS tests only in UNI direction but not in NNI direction.

Board manufacturing information querySupported
Board power consumption information querySupported


detail : https://support.huawei.com/hedex/hdx.do?lib=EDOC1100072441AEI0322V&docid=EDOC1100072441&lang=en&v=05&tocLib=EDOC1100072441AEI0322V&tocV=05&id=EN-US_CONCEPT_0157919533&tocURL=resources/1800v/hd/pkg/md1/md1.html&p=t&fe=1&ui=3&keyword=MD1%2B%2B


Thanks

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  • x
  • convention：

jahangirgp
jahangirgp Created Jul 22, 2020 02:36:16 (0) (0)
Which Device/Device type/platform does belongs to MD1 card?  
wissal
wissal Reply jahangirgp  Created Jul 22, 2020 05:00:34 (0) (0)
Please open the link:
https://support.huawei.com/hedex/hdx.do?lib=EDOC1100072441AEI0322V&docid=EDOC1100072441&lang=en&v=05&tocLib=EDOC1100072441AEI0322V&tocV=05&id=EN-US_CONCEPT_0157919533&tocURL=resources/1800v/hd/pkg/md1/md1.html&p=t&fe=1&ui=3&keyword=MD1%2B%2B  
user_4237671
user_4237671 Created Aug 15, 2021 05:52:11 (0) (0)
 
(1) (0)
4#
liqiang185
liqiang185 Admin Created Jul 22, 2020 03:49:12

Dear friend! 

The external interface of the MD1 board is 120 ohms. You may have converted the 120 ohms to the 75 ohms. Therefore, the 75 ohms is used. If it works, you can ignore it.

1

Thanks!

View more
  • x
  • convention：

user_4237671
user_4237671 Created Aug 15, 2021 05:52:04 (0) (0)
 
(0) (0)
5#
user_4237671
user_4237671 Created Aug 15, 2021 05:52:18

Good
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