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ISDN gateway administration
47
Allocating bandwidth for ISDN to IP calls
You can configure the dial plan to limit the bandwidth available for incoming ISDN calls. This is useful
where you want to limit the network resources available to individual calls. In this way, you can prevent any
one call using the resources to the extent that other incoming calls are prevented.
Allocating bandwidth for IP to ISDN calls
You can configure the dial plan to limit the bandwidth available for calls to particular numbers, or to
allocate more bandwidth to priority calls. As cost is an issue with calls to the ISDN network, you may want
to provide users with a list of prefixes that they can use to control the bandwidth for the calls they make. In
this way, rules enable users to select their own appropriate bandwidth for a call.
Specifying voice-only IP telephone calls
You can configure the dial plan to specify how IP telephone calls (that is voice-only calls) will be forwarded
to the ISDN network. Refer to “Using the ISDN gateway for voice-only calls” on page 47.
Setting up a gatekeeper
Some administrators like to use a gatekeeper to simplify management of IP telephony. In the case of the
ISDN gateway, the use of a gatekeeper can also simplify the management of the dial plan.
You can configure the ISDN gateway to use an H.323 gatekeeper, which can make it easier for ISDN
endpoint users to join conferences using directory numbers rather than requiring them to know the IP
address or host name of the MCU. This is especially useful where there are endpoints which do not allow
the dialling of IP addresses.
Using an H.323 gatekeeper can also make it easier for IP endpoint users to connect to ISDN end-points.
To configure the ISDN gateway to use a gatekeeper, go to
Settings > Gatekeeper.
For more information about configuring the ISDN gateway to use a gatekeeper, refer to the online help
topic “Configuring gatekeeper settings”.
Using the ISDN gateway for voice-only calls
The ISDN gateway can be used to forward voice-only IP calls to the ISDN network (the PSTN); likewise, it
can be used to forward voice-only ISDN calls from the PSTN to IP telephones on the IP network. If you
want to use the ISDN gateway to forward voice-only calls, there are two ways to configure this feature:
globally (that is by configuring unit-wide settings):
either
entirely as a voice-only gateway: where all IP calls and all ISDN calls are forwarded as voice-only
calls
- Codian Video Conferencing 1
- The Americas 2
- Asia Pacific Region 2
- Table of contents 3
- Chapter 1 Introduction 7
- Using this document 8
- Chapters in this guide 9
- Introduction 10
- H.323 protocol 11
- Video conferencing today 13
- MCU 4200 series 15
- Video ports 16
- Additional voice 16
- Concurrent streaming ports 16
- IP VCR 2200 series 17
- Gateway 3200 Series 18
- Simple scenarios 20
- IP network 21
- Sharing data with the IP VCR 23
- ISDN/PSTN 26
- Chapter 5 First steps 31
- The guest user 32
- Port reservation (MCU only) 33
- Auto attendants on the MCU 34
- Auto attendants on the IP VCR 35
- Localized MCU units 36
- Communicating with the unit 36
- First steps 38
- Chapter 6 MCU administration 39
- MCU administration 40
- Conference PINs 42
- Conference ownership 42
- Content channel support 42
- Enabling the MCU for H.239 43
- Configuring endpoints 43
- Setting up a H.323 gateway 43
- Cascading MCUs 44
- Load balancing MCUs 44
- Making recordings 47
- Enabling the IP VCR for H.239 48
- Summary information icon 49
- Transferring recordings 49
- Displaying IP VCR statistics 50
- Installing the ISDN gateway 51
- Basic call routing 52
- Advanced call routing 52
- Setting up a gatekeeper 53
- Monitoring calls 54
- Chapter 9 Using data 55
- H.239 contribution from 56
- Using data 57
- Configuring streaming 59
- Content channel streaming 60
- Web conferencing option 61
- Customizing streaming 62
- Chapter 11 Using a gatekeeper 63
- Conference Creation 64
- (MCU and IP VCR) 65
- Using a gatekeeper 66
- Chapter 12 Using firewalls 67
- Company LAN 68
- Internet 68
- Using firewalls 69
- Field Example setting 70
- Setting the system time 75
- Upgrading software versions 76
- Shutting down a unit 77
- General housekeeping 78
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