Average number of ports on OLT cards

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1

Quick question: (sanity check).

For a deployment happening now by an incumbent telco (aka: serving large
number of homes), how many GPON ports would it want per each OLT card ?

or more precisely, what sort of range is there for the number of ports
for such a deployment?

(The CRTC in Canada is asking for costing info for 4 port cards, so
wondering if this could be squewing the cost per port if cards today are
generally deployed with say 8 or 16 ports).

As an example of where I am coming from: Bell Canada claimed that
Juniper E320s costed $x and had 1 gbps of capacity, which means $x per
gbps of capacity, when in fact, the actual real life capacity with PPPoE
going to L2TP links was about 80gbps, which means $x/80 per gbps, so
significant difference in cost per gbps.

2

Ports typically range from 4 to 16 per card, depending on the model and vendor.

Larger chassis typically have from 16 to 18 slots.

You also have to take in to account oversubscription rates on the port to subscriber, port card to backplane and uplink card to network portions of the system. Some providers may be more conservative in their provisioning than others.

3

I'm mostly seeing 8 or 16 ports per card for GPON these days. Chassis seem to be ranging from 4-16 slots of line cards (plus some other slots for management, uplink, etc.). EPON density seems comparable.

XGS-PON and 10G-EPON seem to be 4-8 ports per card often in the same chassis with GPON/EPON.