Unanswered Question
Apr 29th, 2009

If we install SFP for STM1/OC3 in the SPA-4XOC12-POS iis it will work as STM1 speed or not?

I have this problem too.
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Giuseppe Larosa Wed, 04/29/2009 - 10:13

Hello Ahmed,

it is not only a question of SFP: different clocks, framing structure are used on an OC-12 (actually being superior in the SONET hierarchy) then in an OC-3.

If the linecard is not able to work in dual mode you need an external Sonet ADM to create a virtual cross-connect between an OC-12 and an OC-3 link.


I see that they have multi rate support

Multirate mode support (OC-3 and OC-12)

so with an explicit config and the right SFP you can get one port to act as an OC-3 link.

Hope to help


abakhashwin Wed, 04/29/2009 - 12:58

i do not understand the is the SPA-4XOC12-POS the four port can run OC3 with the SFP for the OC3,PLEASE Confirm

Giuseppe Larosa Wed, 04/29/2009 - 23:48

Hello Ahmed,

you need to configure the port for OC-3 operation mode (multi rate = multi speed capabilities).

Once you do so the port becomes an OC-3 interface and should be able to use the SFP for OC-3 operations.

Hope to help



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