Avamprogetto 2b

LEMF site A LEMF site B

Network interface Network interface CSP B CSP B

Network interface Network interface

CSP A CSP A

VLAN CSP A VLAN CSP B

Firewall-Cluster PTSS

Figure 13 Schematic layout of IP DN Variant B: Direct connection of a CSP to the PTSS

The DN-HP between the CSP and the LEMF is the Ethernet port of the CSP’s network termination equipment. A handover interface with the following specifications is available per CSP at each of the two LEMF sites:

 1000BASE-SX, 1000BASE-T or 1000BASE-LX

 Connector: Electrical RJ-45 or optical LC

 No Spanning Tree Protocol (STP)

 Untagged

The interfaces at both LEMF sites are connected on Ethernet level. Special attention shall be given to avoid loops at the CSP end.

There are solutions with or without the CSP’s router on the premises of the PTSS. A CSP is free to decide whether it wishes to set up its router in the PTSS’ co-location facility or elsewhere.