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Grandstream UCM6100 User Manual for 1.0.9.25 User Manual

Page 137

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Firmware Version 1.0.9.25

UCM6100 Series IP PBX User Manual

Page 136 of 303

option is disabled.

Music On Hold

Select which Music On Hold class to suggest to extensions when putting

them on hold.

Enable LDAP

If enabled, the batch added extensions will be added to LDAP Phonebook

PBX list; if disabled, the batch added extensions will be skipped when

creating LDAP Phonebook.

SIP Settings

NAT

Use NAT when the PBX is on a public IP communicating with devices

hidden behind NAT (e.g., broadband router). If there is one-way audio

issue, usually it's related to NAT configuration or Firewall's support of SIP

and RTP ports. The default setting is enabled.

Can Reinvite

By default, the PBX will route the media steams from SIP endpoints

through itself. If enabled, the PBX will attempt to negotiate with the

endpoints to route the media stream directly. It is not always possible for

the PBX to negotiate endpoint-to-endpoint media routing. The default

setting is "No".

DTMF Mode

Select DTMF mode for the user to send DTMF. The default setting is

"RFC2833". If "Info" is selected, SIP INFO message will be used. If

"Inband" is selected, 64-kbit codec PCMU and PCMA are required. When

"Auto" is selected, RFC2833 will be used if offered, otherwise "Inband"

will be used.

Insecure

• Port: Allow peers matching by IP address without matching port

number.

• Very: Allow peers matching by IP address without matching port

number. Also, authentication of incoming INVITE messages is not

required.

• No: Normal IP-based peers matching and authentication of incoming

INVITE.

The default setting is "Port".

Enable Keep-alive

If enabled, empty SDP packet will be sent to the SIP server periodically to

keep the NAT port open. The default setting is "Yes".

Keep-alive Frequency

Configure the number of seconds for the host to be up for Keep-alive. The

default setting is 60 seconds.

TEL URI

If the end device/phone has an assigned PSTN telephone number, this

field should be set to "User=Phone". Then a "User=Phone" parameter will

be attached to the Request-Line and TO header in the SIP request to

indicate the E.164 number. If set to "Enable", "Tel:" will be used instead of

"SIP:" in the SIP request. The default setting is disabled.

Other Settings

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