how can i erase the firmware of cisco 7912 phone ? the firmware is crashed in this 7912 phone , i want it to download another copy from CUCM8.5 . the way i did on 7911phone doesn't work on 7912.

How many ipsec tunnels are supported in Cisco 3900 routers(with & without the hardware processors)?How much is the throughput of the 3900 routers?I need these data ! thanks!

recently my coustomer bought a 4506E switch(SUP6L-E;WS-X4548-RJ45V+;PWR-C45-2800ACV) .when use their old cables(568a-568b),they found that the 7911 phones(no standalone power) displayed :"ethernet not connect",and the switch console (show power inlin...

  I want telnet to a asa outside interface.I know that the asa doesn't allow to telnet to the lowest interface , but the cisco says "If IPsec operates, you can specify an unsecure interface name, which is typically the outside interface. At a minimum...