Cisco Cisco IOS Software Release 12.2(2)XB

AIM-ATM-VOICE-30—a combined ATM and DSP AIM that supports voice over ATM (VoATM), 
voice over IP (VoIP), and voice over Frame Relay (VoFR). It supports as many as four T1 or E1 
trunks when installed in a Cisco 2600 series or Cisco 3660 router. This AIM is used in combination 
with one T1/E1 multiflex trunk interface (VWIC-MFT) to provide PBX or PSTN signaling 
protocols. It uses VoAAL2 (ITU I.366.1/I.363.2) and VoAAL5, and does not require use of a digital 
T1/E1 packet voice trunk network module. This AIM has an onboard ATM coprocessor for increased 
AAL2 and AAL5 performance, and for as many as four IMA groups, enabling fractional T3 or E3 
bandwidth performance.

See 

 for a summary of capabilities and voice interface hardware for each platform.

General features for all three types of AIM include:

One AIM can be installed on a Cisco 2600 series router, and up to two AIMs on a Cisco 3660

Online insertion and removal (OIR) is supported for the network modules that interoperate with 
AIMs on Cisco 3660 routers, although not for the AIMs themselves

ATM features for AIM-ATM and AIM-ATM-VOICE-30 include:

For Cisco 2600 series routers, up to four ATM ports using multiflex trunk VWICS located either in 
WIC slots or in network modules, such as fast Ethernet network modules or digital T1/E1 packet 
voice trunk network modules

For Cisco 3660 routers with two AIMs, up to eight ATM ports using multiflex trunk VWICS located 
in network modules, such as Fast Ethernet network modules or digital T1/E1 packet voice trunk 
network modules

AAL5 and AAL2 services

IMA 1.1 support for up to four IMA links per AIM

Up to 1024 AAL5 VCs for data or voice features per AIM

Up to 1024 AAL2 VCs with up to 255 subchannels each for voice per AIM

Network clock management support for synchronization between the ATM network and a PBX or 
the PSTN

Voice DSP features for AIM-VOICE-30 and AIM-ATM-VOICE-30 include:

Voice AIMs support all the same signaling types that are normally supported on T1 and E1 lines 
connected to NM-HDV network modules

Integration of complete network management (Simple Management Network Protocol [SNMP], 
Cisco Voice Manager [CVM], CiscoView)

VoIP, VoFR, VoAAL5, and VoAAL2 

Voice over AAL5

Cisco AAL5 switched-voice support

VoIP over ATM

Transparent Common Channel Signaling (T-CCS)

Voice over AAL2

Nonswitched VoAAL2 trunking support

Voice compression with AAL2 for subcell multiplexing on multiple calls

Transparent Common Channel Signaling (T-CCS)

Medium complexity DSP firmware, including the following codecs: G.711 u-law, G.711 a-law, 
G.729a, G.729ab, G.726r16, G.726r24, G.726r32, clear channel, and fax-relay.