Option 51 and 51c

[drbelloso]

How Do I recognize If I have an option 51 or 51C?

 

[johnpoole]

didn't remember the 51 being made redudndant. at one time the 61 was redudnant and the 51 had a single cpu.. but that may have been a local nomenclature

john poole
bellsouth business
columbia,sc

 

[dlesap]

Option 51 has not Core loops part on the left. The CPU are omega, not Thor (CP2/3/4).

John, sure opt51 is not redundant. )

 

[drbelloso]

I need to connect a CC card QPC775 and I´ve got an old manual that tells that in a option 51 the CC is connected in slot 9 in Network module and the 51c in slot 8 core/net. I think that the PBX It´s a 51c because It´s has ENET cards in the core/net (in option 51 the core and network were in differnce shelves?), but in slot 9 is tag as CC

 

[drbelloso]

I`ve got the following card in core/net module:
slot 14: Omega FN
slot 15: Omega IF
slot 16: OCMA
slot 17: Omega 768KMEM
slot 18: MDU

What was the last release for option 51. The customer send me this information but I dont know what the PBX´s release

 

[dlesap]

Clock controler card have to be in slot 9 in Option 51C, left side of PS card. Slot may be labelled as CC.
You cannot say it's opt51C cause ENET card in the core/net.
51C refer to architecture core shelf. ENET card can be seated in 51 and 51C as well. In LD 22 PRT TYPE CINV to check your PBX, or ISS give you the generic number that identify the PBX type

 

[dlesap]

Your system is 51 not 51C !!

 

[dlesap]

Last version for opt 51 was 21.19 in Europa

 

[johnpoole]

not really, it's been over a decade since i saw a 51 and it was an upgrade from a 21.. that was a pain. i worked on old nt's for years and then went to rolm, came back to nortel after the 81c was the "big" switch.. i was trained at one time (memory block) that if you have a cni then your looking at the c model.. but at that time they still made the 21 51 51c 61 61c 71 71c and 81,81c if i remember right they stopped the 21 and came out with the 11,, 90 percent of the switches ive installed were 61c or 81c's with a few (20) opt 11's..

john poole
bellsouth business
columbia,sc