RUS 01 SFP Modules

[mevgheni]

Hello everyone,

Reading this (http://www.dagger12.com/e*******/4478b14ds.pdf) (which is for RRUS, and not RUS, but I expect them to be close enough), it states that prior to 12/01/2017 RDH10265/25 SFP module should be used, after that date, a RDH10247/25 module should be used instead. I have a few questions concerning this information:

1. The "old" module seems to be a 10Gbit one, while the "new" one is only 2.5Gbit. What is the actual link capacity required for proper operation? Is the info I found wrong? the /25 at the end of both subtly suggests that they are both 2.5Gbit. Nevermind, eBay photo of the old module says that it is in fact 10Gbit.
2. What would happen if I use the "old" module after the "deadline"?
3. Would the RRUS accept any generic SFP module other than those 2? I managed to find "compatible" modules (to the "old" one), but they all mention to be "uniquely" programmed.

Thank you,
EM

[slava121]

There are no restrictions on the use of SFP modules.
Can you send photos of these two modules?


Hello everyone,

Reading this (http://www.dagger12.com/e*******/4478b14ds.pdf) (which is for RRUS, and not RUS, but I expect them to be close enough), it states that prior to 12/01/2017 RDH10265/25 SFP module should be used, after that date, a RDH10247/25 module should be used instead. I have a few questions concerning this information:

1. The "old" module seems to be a 10Gbit one, while the "new" one is only 2.5Gbit. What is the actual link capacity required for proper operation? Is the info I found wrong? the /25 at the end of both subtly suggests that they are both 2.5Gbit. Nevermind, eBay photo of the old module says that it is in fact 10Gbit.
2. What would happen if I use the "old" module after the "deadline"?
3. Would the RRUS accept any generic SFP module other than those 2? I managed to find "compatible" modules (to the "old" one), but they all mention to be "uniquely" programmed.

Thank you,
EM

[Nyquist]

Hi.
I have no idea about these codes but about your question What is the actual link capacity required for proper operation? I would say the following:

According to CPRI standards:
Option 3 - 2.5G CPRI has 40MHz of Antenna Bandwidth
Option 5 - 5G CPRI has 80MHz of Antenna Bandwidth
Option 7 - 10G CPRI has 160MHz of Antenna Bandwidth

Some examples:
1) one Radio Unit per sector. No cascading. LTE 10 MHz MIMO 2x2: 10MHz x 2 (MIMO)=20MHz --> 2.5G CPRI (max 40MHz, up to LTE 20MHz MIMO 2x2)
2) one Radio Unit per sector. Cascading with 3 sectors. LTE 10 MHz MIMO 2x2: 10MHz x2 (MIMO) x 3 (SECTORS)=60MHz --> 5G CPRI
3) one Radio Unit per sector. Cascading with 3 sectors. LTE 20MHz MIMO 4x4: 20MHz x4 (MIMO) x 3 (SECTORS)=240MHz --> It's not possible to cascade 3 sectors. 2 sectors cascading (160MHz) with 10G CPRI and third sector stand-alone with 5G CPRI (80MHz)

For every case you should analize and design accordenly

Hope it helps
Nyquist