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# Types of Bundles Overview

Table 1 shows the typical application for each bundle type, and lists the interfaces that each type of bundle supports.

Table 1: Bundle Types and Supported Interfaces

Bundle Type | Generally Used For | Interface Types Supported
--- | --- | ---
CTP (circuit-to-packet) | Connecting legacy serial interfaces to the IP network | CTP150 Serial interface T1/E1 interface CTP2000 Serial interface Serial interface with T1/E1 daughter card Serial interface with 4WTO daughter card Serial interface with IRIG-B daughter card T1/E1 interface
SAToP (structure-agnostic TDM over IP) | Connecting single T1 or E1 interfaces to an IP network | CTP150 T1/E1 interface CTP2000 Serial interface with T1/E1 daughter card T1/E1 interface
CESoPSN (circuit emulation services over a packet-switched network) | Grouping multiple DS0s to one IP circuit | CTP2000 T1/E1 interface with unused DS0s CTP150 T1/E1 interface with unused DS0s An unused DS0 is a DS0 not assigned to another bundle. When a CESoPSN bundle is attached to a port, by default all unused DS0s are assigned to the bundle.
VCOMP (voice compression) | Grouping multiple analog circuits (channels) into one IP circuit | CTP2000 T1/E1 interface 4W-E&M interface Voice compression module

#### Published: 2011-01-09

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