How many ports in Option 81C (by network)

[SpelingChampeon]

I have been asked to supply how many ports are available in an Option 81C. When I told them that it could handle up to 16,000 ports, they wanted to know if I could give them an exact/approximate count, per network group. For ex:

1 Group: Maximum 2000 ports
2 Groups: Maximum 4000 ports
3 Groups: Maximum 8000 ports etc etc

Again, they want/need an approximate count, not my silly ponderings.

I've checked the Nortel site, and Googled it, but get nothing but TOTAL PORTS. Any help would be appreciated.

 

[srmega41]

Here is one way to do it: Your numbers look good, but you could simply say that in a total non-blocking environment, with phones only, each group can handle up to 1008 phones per group.

(32 ts x 4 loops) - 2 = 126 per superloop x 8 superloops per group = 1008. (I think that is right)

Now we all know you rarely have everyone on the phone at the same time, so anything beyond non-blocking is a guess. If you do 50% availability, the number goes to 2016 per group, 25% would equal 4032 per group.

I am not sure on the limitations of columns in an 81, but my guess would be 50% blocking gets you right around that 2000 per group number. With an 8 group system, that gives you the magic 16,000.

Hope this helps,

Scott M.

 

[johnpoole]

with figi interface you can now have 7 groups.. the question is loaded. you can put 2000 stations per group, as long as you don't need trunks or the ability to transfer/conf etc.. the hard number is far lower.. my reply would be at what level of trunk to station blocking? in a pure acd switch, a station without access to an inbound trunk is an agent waiting on calls while a customer hears a busy signal. the question sounds like management trying to do cost justification, don't be surprised if in the future when you need a new group, they ask for a staton count... jmo

john poole
bellsouth business
columbia,sc

 

[srmega41]

JP is right, the total is 7 groups not 8. My mistake, I was trying really hard to make the 16,000 number work. I currently have a 2 group 81 with 4 IPE shelves. We have about 300 phones and 36 T1's, and we have very little room left. Sorry for my earlier blunder.

Good Luck,

Scott M.

 

[srmega41]

Wait a minute, it is 8 groups with the fiji's, 0-7 = 8.

Please ignore me, as I will try to stop being a moron.

Scott M.

 

[jhenley]

With IPE equipment
Your formula would be 16 per card x16 slots per module
=256
you can have 2 IPE modules per Superloop= 512
8 superloops per group = 4096
4096x8 groups (fiber backbone) = 32,768
This the total station with no trunks.

 

[johnpoole]

i disagree with you, your right 0 to 7...

john poole
bellsouth business
columbia,sc

 

[SpelingChampeon]

Thanks for the responses, I will just supply them with a ballpark figure that different scenarios equal different totals. I figured a hard count would be impossible, but thought that someone out there had a Nortel supplied 'configuration' sheet.

Thanks again.

 

[mluckie1]

Make sure to include the Conf/TDS pack for each shlef in the network group. 4 loops 2 in shelf 0 and 2 in shelf 1.