Datasheet

Cisco Systems, Inc.
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Figure 2
High Speed Serial Interface (HSSI) Network Module NM-1HSSI
The NM-1HSSI is a single port, high-speed network module that provides connectivity to a Wide Area Network.
Demand for high capacity corporate backbones, high-speed Internet access, Virtual Private Networks (VPNs), and
trunking connections for service provider internetworking has led to an increase demand for clear channel DS3 and
E3 connections.Also see the NM-1T3/E3 clearchannel T3/E3 Network Module (http://www.cisco.com/warp/public/
cc/pd/ifaa/ps4909/prodlit/ttnp_ds.htm).
The NM-1HSSI Network Module supports speeds up to 52 Mbps. The NM-1HSSI also supports fractional T3/E3
speeds from 56 kbps to 52 Mbps.
Four-Port Network Module (NM-4T)
Figure 3
Four-Port Serial Network Module NM-4T
Table 1 Cable Options for NM-1HSSI
Product Number Cable Type Length Connector Type
CAB-HSI1= HSSI 10 feet (3 meters) Male-to-male
CAB-HNUL= HSSI Null modem 10 feet (3 meters) Male-to-male