experience Huawei agent osn7500 MD75 SSN1MD75 multi-protocol 32-channels E1 interface processing board to OSN 7500 OSN3500
The MD75 receives and transmits 32xE1 signals and works with the PEG8 to process E1 CES and ATM/IMA services.
Table 1 provides the functions and features of the MD75.
| Function and Feature | MD75 | |
|---|---|---|
| Basic functions | Transmits and receives 32xE1 signals, and works with the PEG8 to process E1 CES and ATM/IMA services. | |
| Interface types | Supports 75-ohm E1 electrical interface. The electrical interface uses the DB44 connector. | |
| Interface characteristics | Loopback types of the port |
Inloop Outloop Non-loopback |
| Auto disabling of port loopback | Supported | |
| CES | Number of CES services | 32 |
| Emulation mode |
CESoPSN, SAToP |
|
| Jitter compensation buffering time of CES services | The jitter compensation buffering time of CES services can be set to a value in the range of 0.375 ms to 16 ms with a step of 0.125 ms. | |
| Packet loading time of CES packets | The packet loading time of CES services can be set to a value in the range of 0.125 ms to 5 ms with a step of 0.125 ms.
NOTE:
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|
| ATM/IMA | Number of IMA groups | 32 |
| Maximum number of E1 links in each IMA group | 16 | |
| Number of V-UNI ports | 512 | |
| Number of V-NNI ports | 128 | |
| Cell concatenation | Type:
|
|
| Quantity: 31 | ||
| ATM OAM | Type:
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|
| Quantity: 512 | ||
| Service categories | CBR, UBR, UBR+, rt-VBR, nrt-VBR | |
| ATM QoS | Supported | |
| Clock function | Recovers four CES ACR clocks.
Clocks that are recovered from services over ports 1 and 9 can be added to the clock priority list. NOTE:
Clock recovery over ports 1 to 16 is independent of clock recovery over ports 17 to 32. That is, clocks that are recovered from services over ports 1 to 16 can be transmitted out of ports 1 to 16 and clocks that are recovered from services over ports 17 to 32 can be transmitted out of ports 17 to 32. |
|
| Clock mode | Line Clock Mode and Null. | |
| Line code of E1 link | HDB3 code | |
| Frame format of E1 link | Unframed format, double-framed format, or E1 CRC-4 multiframe format (default value) | |
| Loopback mode | Inloop, outloop, or non-loopback (default value) | |
| Maintenance features |
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