ISDN GW 3241 support up to 4 ports PRI connection by adding port activation key.
However this Gateway is only support PRI.
If you already have ISDN GW 3241 and required to use BRI connection, there is several model of BRI-PRI converter in market which may use for connection.
If you are looking for small ISDN Gateway solution for Cisco TelePresence EX, MX, SX, and C Series endpoints using BRI line, Cisco is planning to release new ISDN Gateway product soon.
For more detail please check http://www.cisco.com/en/US/partner/products/ps12504/index.html.
