Total Access 1500 Redundant-with Cable
By ADTRAN 

AS5400XM High-DEN16T1- 16 AS5X-PVDM2- 64 Ip+ IOS
By Cisco Systems

The Cisco AS54XM-16T1 Universal Gateway offers unparalleled capacity in only two rack units (2RUs) and provides best-of-class voice, fax, and remote-access services. High density (up to 1 Channelized T3 [CT3] of voice over IP [VoIP] and 2 CT3 of time-division multiplexing [TDM] switching), low power consumption (as low as 2.4A at 48 VDC per G.711 CT3), high-density packet voice digital-signal- processor (DSP) modules, universal port DSPs, and session-border- control (SBC) features make the Cisco AS54XM-16T1 Universal Gateway ideal for many network deployment architectures, especially co-location environments and mega points of presence (POPs). ... 

AS5400XM Starter Kit with -Chassis MB Def Memory
By Cisco Systems

The Cisco AS5400XM Universal Gateway offers unparalleled capacity in only two rack units (2RUs) and provides best-of-class voice, fax, and remote-access services. High density (up to 1 Channelized T3 [CT3] of voice over IP [VoIP] and 2 CT3 of time-division multiplexing [TDM] switching), low power consumption (as low as 2.4A at 48 VDC per G.711 CT3), high-density packet voice digital-signal- processor (DSP) modules, universal port DSPs, and session-border- control (SBC) features make the Cisco AS5400XM Universal Gateway ideal for many network deployment architectures, especially co-location environments and mega points of presence (POPs). ... 

AS5400XM Voice G.711 20E1-10 AS5X-PVDM2- 64 Ip+ IOS
By Cisco Systems

The Cisco AS54XM-20E1 Universal Gateway offers unparalleled capacity in only two rack units (2RUs) and provides best-of-class voice, fax, and remote-access services. High density (up to 1 Channelized T3 [CT3] of voice over IP [VoIP] and 2 CT3 of time-division multiplexing [TDM] switching), low power consumption (as low as 2.4A at 48 VDC per G.711 CT3), high-density packet voice digital-signal- processor (DSP) modules, universal port DSPs, and session-border- control (SBC) features make the Cisco AS54XM-20E1 Universal Gateway ideal for many network deployment architectures, especially co-location environments and mega points of presence (POPs). ...