363-206-285
Administration and Provisioning
Issue 3 June 2001
8-27
Allowable Cross-Connects 8
Table 8-5 through Table 8-7 list main and function unit circuit packs and their
allowed cross-connect functionality. It also lists the earliest software release the
cross-connect was available.
The following list defines the cross-connect types listed in Table 8-5 through
Table 8-7.
■ Two-Way: A two-way cross-connection is a bidirectional cross-connection
between two ports. This type of cross-connection, when used to connect
between function groups, is referred to as a “hairpin” cross-connection.
■ Add/Drop: A two-way cross-connection add/drop to/from a ring interface
is a bidirectional cross-connection between a channel on a path-protection
switched ring and a port or channel on a non-ring interface.
■ Dual 0x1: A two-way dual 0x1 cross-connection between two ring
interfaces is a bidirectional cross-connection between channels on each of
two different ring interfaces (no path switching).
■ Intra-FN Dual 0x1: A two-way intra-FN dual 0x1 cross-connection
between two ring interfaces is a bidirectional cross-connection between
channels on the two different ring interfaces supported by a pair of dual-
port OLIUs in the same function unit (no path switching).
■ Dual 0x1 NR: A two-way dual 0x1 cross-connection between a ring
interface and a non-ring interface is a bidirectional cross-connection
between a channel on a ring interface and a port on a non-ring interface
(no path switching).
■ Pass-Through: A two-way pass-through cross-connection on a ring
interface is a bidirectional cross-connection on a single ring interface.
■ Single 0x1: A two-way single 0x1 ring to ring cross-connection is a
bidirectional cross-connection between channels on each of two different
ring interfaces. This type of cross-connection is used in “dual homing”
network configurations (no path switching).
■ Intra-FN Single 0x1: A two-way intra-FN single 0x1 ring to ring cross-
connection is a bidirectional cross-connection between channels on the
two different ring interfaces supported by a pair of dual-port OLIUs in the
same function unit. This type of cross-connection is used in “dual homing”
network configurations (no path switching).
■ Single 0x1 NR: A two-way single 0x1 cross-connection between a ring
interface and a non-ring interface is a bidirectional cross-connection
between a channel on a ring interface and a port on a non-ring interface
(no path switching).
■ Drop/Continue: A drop and continue cross-connection is a bidirectional
cross-connect between a ring and an non-ring interface which also
continues on the ring.
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