Cisco EX90 - Page 32

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Cisco TelePresence System EX90/EX60 Administrator guide
D14726.03 Cisco TelePresence System EX90-EX60 Administrator Guide TC4.0, December 2010.
Copyright © 2010 Cisco Systems, Inc. All rights reserved.
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Advanced conguration
H323 Prole [1..1] PortAllocation
The H.323 Port Allocation setting aects the H.245 port numbers used for H.323 call signalling.
Requires user role: ADMIN
Value space: <Dynamic/Static>
Dynamic: The system will allocate which ports to use when opening a TCP connection. The
reason for doing this is to avoid using the same ports for subsequent calls, as some rewalls
consider this as a sign of attack. When Dynamic is selected, the H.323 ports used are from 11000
to 20999. Once 20999 is reached they restart again at 11000. For RTP and RTCP media data, the
system is using UDP ports in the range 2326 to 2487. Each media channel is using two adjacent
ports, ie 2330 and 2331 for RTP and RTCP respectively. The ports are automatically selected by
the system within the given range. Firewall administrators should not try to deduce which ports are
used when, as the allocation schema within the mentioned range may change without any further
notice.
Static: When set to Static the ports are given within a static predened range [5555-6555].
Ex a m ple: H323 Prole 1 PortAllocation: Dynamic
H323 Prole [1..1] H323Alias E164
The H.323 Alias E.164 denes the address of the system, according to the numbering plan
implemented in the H.323 Gatekeeper. The E.164 alias is equivalent to a telephone number,
sometimes combined with access codes.
Requires user role: ADMIN
Value space: <S: 0, 30>
Format: Compact string with a maximum of 30 characters. Valid characters are 0-9, * and #.
Ex a m ple: H323 Prole 1 H323Alias E164: "90550092"
H323 Prole [1..1] H323Alias ID
Lets you specify the H.323 Alias ID which is used to address the system on a H.323 Gatekeeper and
will be displayed in the call lists. Example: "rstname.surname@company.com", "My H.323 Alias ID"
Requires user role: ADMIN
Value space: <S: 0, 49>
Format: String with a maximum of 49 characters
Ex a m ple: H323 Prole 1 H323Alias ID: "rstname.surname@company.com"
H323 Prole [1..1] CallSetup Mode
The H.323 Call Setup Mode denes whether to use a Gatekeeper or Direct calling when establishing
H323 calls.
Note: Direct H.323 calls can be made even though the H.323 Call Setup Mode is set to Gatekeeper.
Requires user role: ADMIN
Value space: <Direct/Gatekeeper>
Direct: An IP-address must be used when dialling in order to make the H323 call.
Gatekeeper: The system will use a Gatekeeper to make a H.323 call. When selecting this option
the H323 Prole Gatekeeper Address and H323 Prole Gatekeeper Discovery settings must also
be congured.
Ex a m ple: H323 Prole 1 CallSetup Mode: Gatekeeper
H323 Prole [1..1] Gatekeeper Discovery
Determine how the system shall register to a H.323 Gatekeeper.
Requires user role: ADMIN
Value space: <Manual/Auto>
Manual: The system will use a specic Gatekeeper identied by the Gatekeeper's IP-address.
Auto: The system will automatically try to register to any available Gatekeeper. If a Gatekeeper
responds to the request sent from the codec within 30 seconds this specic Gatekeeper will
be used. This requires that the Gatekeeper is in auto discovery mode as well. If no Gatekeeper
responds, the system will not use a Gatekeeper for making H.323 calls and hence an IP-address
must be specied manually.
Ex a m ple: H323 Prole 1 Gatekeeper Discovery: Manual
H323 Prole [1..1] Gatekeeper Address
Enter the IP address of the Gatekeeper. Note: Requires the H.323 Call Setup Mode to be set to
Gatekeeper and the Gatekeeper Discovery to be set to Manual.
Requires user role: ADMIN
Value space: <S: 0, 255>
Format: Only the valid IP address format is accepted. An IP address that contains letters
(192.a.2.0) or unvalid IP addresses (192.0.1234.0) will be rejected.
Ex a m ple: H323 Prole 1 Gatekeeper Address: "192.0.2.0"
The H323 settings, cont...The H323 settings, cont...