Avaya 1140E User Manual Page 99
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Emergency 911 - Operator control of
disconnect
Overview
For Emergency 911 services to be effective, it is vital that a system maintain
a connection with the 911 operator until the user provides all necessary
information. In traditional 911 telephony, if a 911 call is disconnected before
the necessary information is provided, mechanisms are in place to allow
the 911 operator to ring back the calling party. In VoIP calls, 911 support is
an evolving standard.
If the user of an IP Phone 1140E attempts to disconnect a 911 call after the
911 operator has answered, the IP Phone 1140E switches to hands-free
mode. Once the IP Phone 1140E is in hands-free mode, the 911 call can
only be disconnected by the operator.
Emergency 911 calls originate on the IP Phone 1140E and are completed
by the Call Server. The Call Server communicates with the 911 network or
911 systems for routing, call control, and location information. Although the
IP Phone 1140E allows users to enter location information, this location
information is not used by all Call Servers. Some Call Servers derive
the location information based on the number and location databases.
Characteristics of Emergency 911 calls and limitations of Emergency 911
calls using the IP Phone 1140E are given below.
Location information
Effective Emergency 911 services also rely on accurate location information.
The IP Phone 1140E supports the inclusion of the x-nt-location header in
SIP messages that provide location information to a Nortel call server. The
location information is selected by the user during registration, and must be
correctly provisioned at the call server level (see appropriate NTP specific
to your call server).
SIP Fir mware Release 1.1 for IP Phone 1140E Administration
NN43113-300 02.05 Standard
27 May 2008
Copyright © 2008, Nortel Networks
.
- Phone 1140E Administration 1
- Contents 3
- Index 127 5
- 6 Contents 6
- New in this release 7
- 8 New in this release 8
- How to Get Help 9
- 10 How to Get Help 10
- Introduction to this guide 11
- Related publications 13
- 14 Introduction to this guide 14
- Overview 15
- Related documentation 16
- Installation overview 17
- 18 Overview 18
- Figure 2 18
- Introduction 19 19
- Figure 3 19
- Supported SIP proxy servers 20
- Before installation 21
- Preinstallation 23 23
- 24 Before installation 24
- How provisioning works 25
- Procedure 3 26
- Figure 4 27
- Sample provisioning file 27
- IP Phone 1140E 30
- Device configuration commands 34
- ATTENTION 36
- Feature configuration commands 36
- QoS and ToS commands 44
- Tone configuration commands 45
- NAT configuration commands 47
- VQMon configuration commands 48
- System commands 50
- Dialing function description 52
- Dialing plan 52
- Figure 7 53
- Figure 8 53
- Figure 9 54
- Figure 10 55
- DRegex rules 55
- Downloadable WAV files 56
- Configure the DHCP server 57
- Full DHCP mode 58
- SIP IP Phone class identifier 59
- DHCP VLAN Auto Discovery 61
- 62 Configure the DHCP server 62
- Procedure 4 63
- Installing the IP Phone 1140E 63
- Figure 11 65
- IP Phone 1140E connections 65
- 1140E firmware 67
- Procedure 6 68
- Procedure 7 69
- 3. [FW] Finished 77
- Voice Quality Monitoring 79
- Server set-up 80
- How VQMon works 80
- Introduction 81
- Authorization 83
- Device ID 83
- Password 83
- NO DHCP mode 83
- Net Mask 84
- Voice VLAN 84
- VLAN Filter 85
- Disable PC Port 85
- Data VLAN 86
- PC-Port Untag all 86
- Ignore GARP 87
- Provisioning 87
- NAT Traversal 88
- PVQMon IP 88
- Configure the device settings 89
- STUN S2 IP: 96
- (Single Call Arrangement) 97
- Privacy access codes 98
- Location information 99
- Dialing plan configuration 100
- Characteristics of E911 calls 100
- IP Phone 1140E restrictions 101
- NN43113-300 02.05 Standard 102
- 27 May 2008 102
- NAT firewall traversal 103
- 104 NAT firewall traversal 104
- Three-port switch and VLAN 105
- Phone 1140E 109
- SIP responses 110
- Default error handling 115
- SIP header fields 115
- SDP and Call Hold 119
- Transport layer protocols 119
- SIP security authentication 119
- SIP DTMF Digit transport 120
- Supported subscriptions 120
- Supported instant messaging 120
- Nortel unencrypted Yes 121
- Nortel encrypted Yes 121
- Procedure 14 123
- Reloading UNIStim Firmware 123
- IP Phone 1140E diagnostics 124
- Symbols/Numerics 127
- 128 Index 128
- Index 129 129
- 130 Index 130
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