Datasheet

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Q. Can I use a combination of internal and external -48V DC power supplies to get redundancy on the Cisco 3825 and/or to increase the number of
redundant Cisco EtherSwitch ports on the Cisco 3845 platform?
A. Yes. There is a two power supply to one Cisco EtherSwitch module cable ratio, which connects two external power supplies to a single Cisco
EtherSwitch module. This provides redundancy in the event that one of the power supplies fails. Software monitors the signals “PS1 Present,” “PS1
OK,” “PS2 Present,” and “PS2 OK” on this cable, and allocates up to 360W of power for this configuration. The part number for this cable is CAB-
PPWR-PS1-2.
Q. If I have a system with both an integrated -48V DC internal power supply and an external -48V DC power supply, will the phone power
be disturbed if I pull out the external power supply cable?
A. If the -48V DC load of all of the IP phones being powered is less than the 360W capability of the integrated internal power supply, pulling the
external power supply will not disturb the IP phones in any way. You can insert and remove the external power supply cable without causing any
problems.
SOFTWARE FEATURES AND NEW CISCO IOS COMMANDS
Q. What is the Interface Data Block (IDB) limit for the Cisco 3800 Series?
A. There are 1200 and 1400 IDBs supported on the Cisco 3825 and Cisco 3845, respectively (this is the same as Cisco 3700 Series).
Q. What are some of the new Cisco IOS features supported in Release 12.3(11)T?
A. Numerous new features are available in Cisco IOS Software Release 12.3(11)T on the Cisco 3800 Series. Please refer to the Feature Navigator
at
http://www.cisco.com/go/fn.
Q. Is the Cisco IOS SNA Switching feature set supported on the Cisco 3800 Series?
A. Yes. A single Cisco IOS SNA Switching feature set will be available for the Cisco 3800 Series called Advanced Enterprise Services with SNA
Switching with 3DES, product names are: S382SNAK9 and S384SNAK9.
Q. Are there any platform-specific Cisco IOS commands that will be introduced with the Cisco 3800 Series?
A. Yes. There are some new Cisco IOS commands that will enhance the management of these platforms. They are:
• Tftpdnld—Trivial File Transfer Protocol (FTP) download is now supported on the Cisco 3800 Series in ROMMON mode.
• facility-alarm {core-temperature|intake-temperature} <30-70>—Configure temperature threshold for alarms
• media-type {rj45 | sfp}—Select between RJ-45 and SFP connector on onboard Gigabit Ethernet port 0.
TDM SUPPORT
Q. What time-division multiplexing (TDM) capabilities are supported on Cisco 3800 Series routers?
A. These routers support TDM Drop-and-Insert capability between AIMs, VWICs in built-in HWIC slots, or VWICs in network modules.
The TDM bus connecting all interfaces is standard with these platforms.
Q. Is additional hardware required to support TDM capabilities?
A. No additional hardware is required. The TDM switch is integrated with the motherboard.
Q. What is the accuracy of the clock on the TDM blackplane?
A. Stratum 4E is standard on the Cisco 3825 and Cisco 3845 routers.