Cisco Cisco ONS 15454 M12 Multiservice Transport Platform (MSTP) Guida All'Installazione

The Cisco RAN Service Module consists of four independent IOS processors. Contained in a circuit card 
enclosure, the Cisco ONS 15454 RAN Service Module weighs 3.1 pounds (1.3 kg) and measures 12.65 
in. high x 0.716 in. wide x 9.0 in. deep (32.13 cm x 1.82 cm x 22.86 cm). 

Each Cisco RAN Service Module has four 10/100/1000 Gigabit Ethernet (RJ-45) ports with one port 
connected to each IOS processor. The Cisco RAN Service Module is also equipped with four VC-4 level 
Packet over SONET (POS) interfaces and four VC-4 level ATM interfaces. The DSO are maped with a 
maximum of 126 DSO/E1 interfaces that are distributed among the traffic CPUs for backhaul and 
shorthaul interfaces depending upon the application. We support a maximum of 96 for GSM-ABIS 
shorthaul interfaces and a maximum of 48 HDLC/PPP/backhaul interfaces

ATM interfaces on the RAN-SVC module support a maximum MTU of 4064. This differs with some 
other Cisco devices as well as other vendors equipment. IP equipment directly connected to the 
RAN-SVC ATM interfaces should set their MTU to 4064 for optimum operation.

One IOS processor is dedicated as a service processor while the remaining three IOS processors are 
dedicated as traffic processors. The Cisco ONS 15454 RAN Service Module also includes two RJ-45 
ports, one used as a DCE console (labeled Console) and the other used as a debug port (covered with a 
tab plate). 

The Cisco ONS 15454 shelf assembly has 17 card slots that are numbered sequentially from left to right. 
Slots 1 – 4 and 14 – 17 are multispeed slots. Slots 5, 6, 12 and 13 are high-speed slots. Slots 7 and 11 
are dedicated to TCC-I cards. Slots 8 and 10 are dedicated to cross-connect (XC10G) cards. Slot 9 is 
dedicated to the AIC card. Slots 3 and 15 can host E1N-14 and DS3i-N-12 cards that are used in 1:N 
protection. The Cisco ONS RAN Service Module can be installed in Slots 1 thru 6 or 12 thru 17 
depending on the application and line card configuration.

See the Cisco ONS 15454 SDH Installation and Operations Guide for proper installation of the RAN Service 
Module and other Cisco ONS 15454 cards.

On the Cisco ONS 15454 RAN Service Module faceplate (see 

), two LEDs (labeled 

FAIL (for board failure) and ACT/STBY (for active and standby) are provided (see 

for a description). The 10/100/1000 Ethernet (RJ-45) ports (also located on the front panel) are labeled 
0, 1, 2, and 3. Each port has two status LEDs, a link status LED (steady green indicating a link up) and 
a link activity LED (blinking yellow indicating RX/TX activity).

Shelf assembly slots have symbols indicating the type of cards that you can install in the slots. Each 
Cisco ONS 15454 RAM Service Module has a corresponding symbol (Orange/Circle). The symbol on 
the card must match the symbol on the slot (see the Cisco ONS 15454 SDH Installation and Operations 
Guide for more detailed information).