выбор кстати не очень большойAvailable LAN connectivity network modules for the Cisco2600/3600/3700 series include the following:
Fast Ethernet
NM-1FE-TX—One-port Fast Ethernet (10/100BaseTX interface)NM-1FE-FX—One-port Fast Ethernet (100BaseFX interface)
NM-1FE-FX-V2 -One-port Fast Ethernet, revision 2, (100BaseFX interface)
NM-1FE-SMF- One-port Fast Ethernet (100BaseFX Single Mode Fiber interface)
NM-1FE1CT1—One 10/100 Ethernet with one ISDN/PRI or Channelized T1
NM-1FE1CT1-CSU —One 10/100 Ethernet with one ISDN/PRI or Channelized T1 with integrated CSU
NM-1FE2CT1—One 10/100 Ethernet with 2 ISDN/PRI or Channelized T1
NM-1FE2CT1-CSU—One 10/100 Ethernet with two ISDN/PRI or Channelized T1 with integrated CSU's
NM-1FE1CE1B—One 10/100 Ethernet with one ISDN/PRI or Channelized E1 (balanced)
NM-1FE2CE1B—One 10/100 Ethernet with two Channelized E1 or ISDN/PRI (balanced)
NM-1FE1CE1U—One 10/100 Ethernet with one Channelized E1 or ISDN/PRI (unbalanced)
NM-1FE2CE1U—One 10/100 Ethernet with two Channelized E1 or ISDN/PRI (unbalanced)
Ethernet
NM-4E—Four-port Ethernet
NM-1E—One-port Ethernet
NM-1E2W—One-port Ethernet, plus two WAN interface card slots
NM-2E2W—Two-port Ethernet, plus two WAN interface card slots
Token Ring
NM-1E1RW—One-port Token Ring, one-port Ethernet, plus two WAN interface card slots