Draytek 5500 Series manual Specify Clid or Remote, VPN Gateway, Identity

Specify CLID or Remote	You can specify the IP address of the remote dial-in user or
VPN Gateway	peer ID (should be the same with the ID setting in dial-in
	type) by checking the box. Enter Peer ISDN number if you
	select ISDN above (This feature is useful for i model only.).
	Also, you should further specify the corresponding security
	methods on the right side.
	If you uncheck the checkbox, the connection type you select
	above will apply the authentication methods and security
	methods in the general settings.
User Name	This field is applicable when you select ISDN, PPTP or L2TP
	with or without IPSec policy above.
Password	This field is applicable when you select ISDN, PPTP or L2TP
	with or without IPSec policy above.
VJ Compression	VJ Compression is used for TCP/IP protocol header
	compression. This field is applicable when you select ISDN,
	PPTP or L2TP with or without IPSec policy above.
IKE Authentication	This group of fields is applicable for IPSec Tunnels and L2TP
Method	with IPSec Policy when you specify the IP address of the
	remote node. The only exception is Digital Signature (X.509)
	can be set when you select IPSec tunnel either with or without
	specify the IP address of the remote node.
	Pre-Shared Key - Check the box of Pre-Shared Key to
	invoke this function and type in the required characters (1-63)
	as the pre-shared key.
	Digital Signature (X.509) – Check the box of Digital
	Signature to invoke this function and select one predefined
	Profiles set in the VPN and Remote Access >>IPSec Peer
	Identity.
IPSec Security Method	This group of fields is a must for IPSec Tunnels and L2TP
	with IPSec Policy when you specify the remote node.
	Medium- Authentication Header (AH) means data will be
	authenticated, but not be encrypted. By default, this option is
	active.
	High- Encapsulating Security Payload (ESP) means payload
	(data) will be encrypted and authenticated. You may select
	encryption algorithm from Data Encryption Standard (DES),
	Triple DES (3DES), and AES.
Callback Function	The callback function provides a callback service only for the
	ISDN LAN-to-LAN connection (this feature is useful for i
	model only). The remote user will be charged the connection
	fee by the telecom.
	Check to enable Callback function-Enables the callback
	function.
	Callback number-The option is for extra security. Once
	enabled, the router will ONLY call back to the specified
	Callback Number.
	Callback budget- By default, the callback function has
	limitation of callback period. Once the callback budget is
	exhausted, the function will be disabled automatically.
	Callback Budget (Unit: minutes)- Specify the time budget
	for the dial-in user. The budget will be decreased
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