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| Part Number | Description | |
| PA-MC-2E1/120 | 2 port multichannel E1 port adapter with G.703 120ohm interf | |
| PA-MC-2T1 | 2 port multichannel T1 port adapter with integrated CSU/DSUs | |
| PA-MC-2T1 | 2 port multichannel T1 port adapter with integrated CSU/DSUs | |
| PA-POS-2OC3 | 2 Port Packet/SONET OC3c/STM1 Port Adapter | |
| PA-VXB-2TE1+ | 2 port T1/E1 moderate capacity enhanced voice PA | |
| PA-VXB-2TE1+ | 2 port T1/E1 moderate capacity enhanced voice PA | |
| PA-2T3+ | 2 Port T3 Serial Port Adapter Enhanced | |
| PA-VXC-2TE1+ | 2 port TE1 hi-capacity enhanced voice PA | |
| PA-VXC-2TE1+ | 2 port TE1 hi-capacity enhanced voice PA | |
| NM-2W | 2 WAN Card Slot Network Module(no LAN) | |
| NM-2W | 2 WAN Card Slot Network Module(no LAN) | |
| HWIC-2SHDSL | 2-pair G.shdsl HWIC | |
| VWIC2-2MFT-T1/E1 | 2-Port 2nd Gen Multiflex Trunk Voice/WAN Int. Card - T1/E1 | |
| VWIC2-2MFT-G703 | 2-Port 2nd Gen Multiflex Trunk Voice/WAN Int. Card - G.703 | |
| WIC-2A/S | 2-Port Async/Sync Serial WAN Interface Card | |
| WIC-2A/S | 2-Port Async/Sync Serial WAN Interface Card | |
| NM-2CE1T1-PRI | 2-Port Channelized E1/T1/ISDN-PRI Network Module | |
| NM-2CE1T1-PRI | 2-Port Channelized E1/T1/ISDN-PRI Network Module | |
| SPA-2XCT3/DS0 | 2-port Channelized T3 to DS0 Shared Port Adapter | |
| SPA-2XT3/E3 | 2-port Clear Channel T3/E3 Shared Port Adapter |