Cisco ONS 15454 DWDM Reference Manual

11-3
Cisco ONS 15454 DWDM Reference Manual, R8.5
78-18343-02
Chapter 11 Optical Channel Circuits and Virtual Patchcords Reference
11.1.3 OCH Trail Circuits
11.1.3 OCH Trail Circuits
OCH trail circuits transport the OCHCCs. The OCH trail circuit creates an optical connection from the
source trunk port to the destination trunk port of the Transponder (TXP), Muxponder (MXP), GE_XP,
10GE_XP, or ITU-T line card. The OCH trail represents the common connection between the two cards,
over which all the client OCHCC circuits, SVLAN circuits or STS circuits are carried.
Once an OCHCC is created, a corresponding OCH Trail is automatically created. If the OCHCC is
created between two TXP, MXP, GE_XP, or 10GE_XP cards, two circuits are created in the CTC. These
are:
One OCHCC (at client port endpoints)
One OCH trail (at trunk port endpoints)
If the OCHCC is created between two TXPP or two MXPP cards, three circuits are created in the CTC.
These are:
• One OCHCC (at client port endpoints)
• Two OCH Trails (at trunk port endpoints)
One for the working and other for the protect trunk.
Note On a TXP, MXP, and GE_XP card (in layer 1 DWDM mode), additional OCHCC circuits are created
over the same OCH trail.
Note On a TXP, MXP, GE_XP (in layer 1 DWDM mode), and 10GE_XP (in layer 1 DWDM mode) card, the
OCH trail cannot be created independently, and is created along with the first OCHCC creation on the
card. However, on a GE_XP card (in layer-2 DWDM mode), 10GE_XP card (in layer-2 DWDM mode),
and ADM_10G card, an OCH trail can be created between the trunk ports for the upper layer circuits
(SVLAN in GE_XP/10GE_XP and STS in ADM_10G). No OCHCC is supported in these cases.
If the OCHCC is created between two ITU-T line cards, only one trunk port belongs to the OCHCC at
each end of the circuit. Table 11-2 lists the ports that can be OCHCC and OCH trail endpoints.
Table 11-2 OCHCC and OCH Trail Ports
Card OCHCC OCH Trail
TXPs
MXPs
GE_XP
10GE_XP
ADM-10G
Any client port Any trunk port
ITU-T line cards:
• OC48/STM64 EH
• OC192 SR/STM64
• MRC-12
• MRC-2.5-12
• MRC-2.5G-4
Any trunk port Any trunk port

Cisco ONS 15454 DWDM Specifications

General

Chassis Type	DWDM
Form Factor	Rack-mountable
Slots	17
Storage Temperature	-40 to 158°F (-40 to 70°C)
Relative Humidity	5% to 95% non-condensing
Power Supply	AC or DC
Cooling	Internal fans
Operating Temperature	23 to 104°F (-5 to 40°C)
Altitude	0 to 6500 ft (0 to 1981 m)
Safety Compliance	EN 60950-1
EMI Compliance	FCC Part 15