The following cards and modules support channelization down to the DS0 level:
16-port T1/E1 ASAP Adapter card
32-port T1/E1 ASAP Adapter card
12-port Serial Data Interface card
6-port E&M Adapter card
2-port OC3/STM1 Channelized Adapter card
4-port DS3/E3 Adapter card
8-port Voice & Teleprotection card
8-port C37.94 Teleprotection card
8-port FXO Adapter card
6-port FXS Adapter card
4-port T1/E1 and RS-232 Combination module
On the 16-port T1/E1 ASAP Adapter card, 32-port T1/E1 ASAP Adapter card, 2-port OC3/STM1 Channelized Adapter card, and 4-port DS3/E3 Adapter card (DS3 ports only), and on the T1/E1 ports of the 4-port T1/E1 and RS-232 Combination module, up to 24 channel groups are supported on a DS1 circuit and up to 32 channel groups on an E1 circuit.
The 12-port Serial Data Interface card supports a single channel group on a channelized V.35 circuit, RS-530, RS-232 (also known as EIA/TIA-232) circuit, or X.21 circuit. The RS-232 ports on the 4-port T1/E1 and RS-232 Combination module also support a single channel group on a channelized RS-232 circuit.
The 6-port E&M Adapter card supports a single channel group on a channelized E&M voice interface.
The 8-port Voice & Teleprotection card supports a single channel group on a channelized G.703 (codirectional) circuit, an IEEE C37.94 teleprotection interface (TPIF) circuit, FXS circuit, or FXO circuit.
The 8-port C37.94 Teleprotection card supports a single channel group on an IEEE C37.94 teleprotection interface (TPIF) circuit.
The 8-port FXO Adapter card supports a single channel group on an FXO circuit.
The 6-port FXS Adapter card supports a single channel group on an FXS circuit.
The 4-port OC3/STM1 / 1-port OC12/STM4 Adapter card supports channelization at the DS1/E1 level only.