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AN-30 System User Manual 

 

The AN-30 can be equipped with a narrow beam antenna to provide high directivity for 
long-range operations up to 30 miles (50 km) under line of sight (LOS) conditions, and 
up to 6.2 miles (10 km) under non line of sight (NLOS) conditions.   
 
The AN-30 system is a Class A digital device for use in a commercial, industrial or 
business environment. 
 
 
 

 
TDM transport is achieved through a form of circuit emulation, which has been 
specifically optimized for wireless operation.  
 
TDM traffic, digitized voice or chanelized data, is received by the AN-30 at the RJ48 / 
BNC interfaces, interpreted and encapsulated within an Ethernet frame structure. The 
Ethernet encapsulated traffic is  then transported over the wireless link to a remote end 
AN-30, where the TDM traffic is reconstructed by reversing the encapsulation process 
and re-clocking the TDM traffic. 
 
Variable delay is commonly associated with packet based networks and can be 
introduced by the AN-30 during packet processing and transmision of simultaneous TDM 
and data traffic streams.  In order to insure proper timing of the reconstructed traffic, the 
remote AN-30 employs a jitter buffer that is user defined between 5 and 300 msec. The 
jitter buffer is used to compensate for any delay variation that may occur during transport 
of the ethernet encapsulated traffic.   For time sensitive applications, such as TDM voice, 
the buffer is typically set below 10 msec, while more data centric applications would 
employ a buffer that is closer to 300 msec to maximize packet efficiency. 
 
Fractional nx64 services are also supported by allowing the user to specify which 
timeslot chanels to transport over the wireless link. Timeslots can be set from 1 to 24 for 
T1 and from 1 to 32 for E1. 
 
The AN-30 supports IEEE 802.1p, 802.1Q and 802.3x. Using these standards for VLAN 
tagging prioritization and flow control the AN-30 is able to maintain the necessary QoS 
guarantees for TDM traffic while simultaneously transporting data applications using the 
excess bandwidth.   
 
 

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