IP Address

Default = 0.0.0.0 (Accept any address)

If an address is entered here, the IP Office will only accept registration from a device with that address.

MAC Address

Default = 0000000000000 (Grayed out)

This field is grayed out and not used.

Codec Selection

Default = System Default

Set the supported codecs. Where possible, Avaya recommend that you use the same set of codecs for all IP Office systems, lines, and extensions.

The options are:

• System Default - Use the codec list set in the system settings.

• Custom - Configure a list of codec preferences for the line.

  • You can move codecs between the Unused and Selected sets and change the order of the codecs.

  • The codecs available are set by System Settings > System > VoIP. The possible codecs are:

    • OPUS - Supported on Linux-based IP Office systems only.

    • G.711 ALAW/G.711 ULAW

    • G.729

    • G.723.1 - Supported on IP500 V2 systems only.

    • G.722 64K - Supported by Linux-based IP Office systems and on IP500 V2 systems with IP500 VCM, IP500 VCM V2 or IP500 Combo cards.

TDM | IP Gain

Default = Default (0dB). Range = -31dB to +31dB.

Allows adjustment of the gain on audio from the system TDM interface to the IP connection. This field is not shown on Linux based platforms.

IP | TDM Gain

Default = Default (0dB). Range = -31dB to +31dB.

Allows adjustment of the gain on audio from the IP connection to the system TDM interface. This field is not shown on Linux based platforms.

Supplementary Services

Default = H450.

Selects the supplementary service signaling method for use with non-Avaya IP devices. Options are None, QSIG and H450. For H450, hold and transfer are supported. Note that the selected method must be supported by the remote end.

Media Security

Default = Same as System.

These settings control whether SRTP is used for this extension and the settings used for the SRTP. The options are:

• Same as System: Matches the system setting at System Settings > System > VoIP Security.

• Disabled: Use RTP.

• Preferred: Attempt to use SRTP. If SRTP call setup is unsuccessful, fall back to RTP.

• Enforced: Use SRTP. If SRTP call setup is unsuccessful, the call fails.

  • For calls using Dial Emergency, the IP Office will switch to RTP if SRTP call setup fails.

Advanced Media Security Options

Default = Same as System.

Sets the requirements for SRTP when enabled.

• Same as System:

  Use the same settings as configured on System Settings > System > VoIP Security.

• Encryptions: Default = RTP

  Sets which parts of a session SRTP protects using encryption.

• Authentication: Default = RTP and RTCP

  Sets which parts of the session SRTP protects using authentication.

• Replay Protection SRTP Window Size: Default = 64. Not adjustable.

  The IP Office will accept authenticated packets that have a sequence number that is higher than or within 64 packets of the highest-numbered packet already received.

• Crypto Suites: Default = SRTP_AES_CM_128_SHA1_80.

  Set the crypto suites SRTP uses for encryption. The options are SRTP_AES_CM_128_SHA1_32 and SRTP_AES_CM_128_SHA1_80.

VoIP Silence Suppression

Default = Off

When enabled, when the IP Office detects silence during an IP call, it does not send any audio data.

• Lines between IP Office systems using G.711 ignore this feature.

• On trunks between networked IP Office systems, you must enable the setting at both ends.

Enable FastStart for non-Avaya IP Phones

Default = Off

A fast connection procedure. Reduces the number of messages that need to be exchanged before an audio channel is created.

Out of Band DTMF

Default = On

When on, DTMF is sent as a separate signal ("Out of Band") rather than as part of the encoded voice stream ("In Band"). The "Out of Band" signaling is inserted back into the audio by the remote end. This is recommended for low bit-rate compression modes such as G.729 and G.723 where DTMF in the voice stream can become distorted.

For Avaya 1600, 4600, 5600 and 9600 Series phones, the system will enforce the appropriate setting for the phone type.

Requires DTMF

Default = Off.

This field is displayed when Ignore DTMF Mismatch for Phones (System >  > VoIP is enabled.

• If disabled, during the checks for direct media on calls between two VoIP phones, the system ignores the DTMF checks.

  • Direct media may still not be possible if other settings, such as codecs, NAT settings, or security settings, do not match.

• If enabled, the extension needs to receive DTMF signals.

  • When enabled, the extension setting is ignored for contact center applications. Contact center application SIP extensions are always treated as requiring DTMF.

Local Tones

Default = Off

When selected, the H.323 phones generate their own tones.

Allow Direct Media Path

Default = On

This settings controls whether calls between IP endpoints and/or lines must go through the IP Office.

• If disabled, calls go through the IP Office and use its resources. RTP relay allows calls between devices using the same audio codec to not require a voice compression channel.

• If enabled, calls can take routes other than through the IP Office system. Both ends must support direct media and have matching VoIP settings. For example, both ends must use the same protocol (SIP or H.323), same addressing (IPv4 or IPv6), and so on. Otherwise, the call goes through the IP Office system.

  • For extensions, disabling Requires DTMF allows the extension to attempt direct media even if the other end has differing DTMF settings.

Reserve License

Default = None.

By default, the IP Office issues phone licenses in the order that devices register. Using this setting, you can license an extension before the device registers.

The options are:

• Reserve Avaya IP Endpoint License

• Reserve 3rd Party IP Endpoint License

• Both

• None

Note:

• Avaya IP phones supported by IP Office require an Avaya IP Endpoint license.

• Other IP phones require a Third-Party IP Endpoint license.

• When WebLM licensing is enabled, this field is automatically set to Reserve Avaya IP Endpoint License. The Both and None options are not available.

• When the Profile of the corresponding user is set to Centralized User, this field is automatically set to Centralized Endpoint License.