The VLNC33 circuit pack supports up to 3 optical Fast Ethernet (100BASE-LX) ports and serves as an extension for the VLNC42B circuit pack. The VLNC33 is only supported when the VLNC42B is inserted in the Main2 slot; the VLNC33 is not supported if any other pack is installed in the shelf other than the VLNC42B in Main 2.
The VLNC40/42/42B circuit pack supports up to 20 10/100BASE-T, IEEE 802.3-compliant electrical interfaces that are capable of spanning distances of 100 meters. When the auto-negotiate mode is enabled on a 10/100BASE-T interface, the interface automatically negotiates the duplex mode (full/half duplex) and speed (10/100 Mb/s) when interfacing with another 802.3-compliant device over twisted-pair media. The VLNC40/42/42B circuit pack is housed in the MAIN2 slot and is not equipment protected.
The VLNC60 circuit pack has a MGMT LAN port on the faceplate and two Ethernet LAN ports with PTM sockets for Fast Ethernet or Gigabit Ethernet connections. Both Ethernet interfaces must be the same rate. The Ethernet port #1 (the right-most port) can be routed as an electrical GbE across the backplane to a companion VLNC40/42/42B circuit pack. The VLNC60 circuit pack is installed in the MAIN1 or MAIN2 slot.
The VLNC60 also provides TDM interface termination for up to 8 DS1/E1 interfaces. The VLNC60 circuit pack supports CES and ML-PPP termination on a port-by-port basis. These services can be mixed as needed among the ports.
The VLNC61 circuit pack has a MGMT LAN port on the faceplate and two Ethernet LAN ports with PTM sockets for Fast Ethernet or Gigabit Ethernet connections. Both Ethernet interfaces must be the same rate. The Ethernet port #1 (the right-most port) can be routed as an electrical GbE across the backplane to a companion VLNC40/42/42B circuit pack. The VLNC61 circuit pack is installed in the MAIN1 or MAIN2 slot. The VLNC61 (series S1:3 and later) simultaneously provides SyncE timing output signal to the backplane for the adjacent circuit pack (SyncE transmit mode) and differential timing (for DS1/E1 ports) used in circuit emulation applications.
The VLNC61 also provides TDM interface termination for up to 16 DS1/E1 interfaces. The VLNC61 circuit pack supports CES and ML-PPP termination on a port-by-port basis. These services can be mixed as needed among the ports.
The VLNC62 circuit pack has a MGMT LAN port on the faceplate and two Ethernet LAN ports with PTM sockets for Fast Ethernet or Gigabit Ethernet connections. Both Ethernet interfaces must be the same rate. The Ethernet port #1 (the right-most port) can be routed as an electrical GbE across the backplane to a companion VLNC40/42/42B circuit pack. The VLNC62 circuit pack is installed in the MAIN1 or MAIN2 slot.
The VLNC62 provides TDM interface termination for up to 8 DS1/E1 interfaces. The VLNC62 circuit pack supports CES and ML-PPP termination on a port-by-port basis. These services can be mixed as needed among the ports. The VLNC62 simultaneously provides SyncE timing output signal to the backplane for the adjacent circuit pack (SyncE transmit mode) and differential timing (for DS1/E1 ports) used in circuit emulation applications. The VLNC62 supports Time of Day (ToD) and 1 pulse per second (PPS) reception and transmission. It also provides sync out capability.
The VLNC64 Circuit Emulation Mini-Hub circuit pack is a variation of the VLNC60 Circuit Emulator circuit pack that performs CES hub and pseudowire functions. Instead of supporting electrical DS1/E1 interfaces, the VLNC64 circuit pack provides a single optical channelized OC-3/STM-1 interface on the TDM side, and two optical FE/GbE interfaces on the Ethernet side. Ethernet interfaces must be the same rate.
The VLNC64 Circuit Emulation Mini-Hub may be installed in the MAIN1 or MAIN2 slot. It is compatible with all interface units (VLIU[1,2,3,10]). When installed in MAIN1, the VLNC64 circuit pack may work with a VLNC40/42/42B circuit pack in the adjacent MAIN 2 slot. The VLNC64 (series S1:2 and later) simultaneously provides SyncE timing output signal to the backplane for the adjacent circuit pack (SyncE transmit mode) and differential timing (for DS1/E1 ports) used in circuit emulation applications. The VLNC64 circuit pack also interworks at the far end of the Ethernet links with multiple, aggregated VLNC60/61/62 circuit packs. The optical OC-3/STM-1 interface is intended for connecting to an external DACS or ADM.
10/100/1G T/F circuit packs comply with the following formatting standards:
Packet size, including one or more VLAN tag headers as defined in IEEE 802.3as, is up to 9216 bytes on the VLNC40/42/42B circuit packs.
Protection (802.1W) and Ethernet Bridging (802.1D) on VLNC40/42/42B
Note:
For VLNC60/61/62/64, the VLAN numbers are derived based on the following assumptions:
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