# High Layer Compatibility

## Purpose

This form allows you to define High Layer Compatibility (different services available from your Telco) on a Fixed or Call-by-Call basis. The optional values for fixed or call by call are independent of protocol and variants (E1 only).

Use this form when performing the following tasks:

- Program Embedded BRI Trunks

- Program Embedded PRI/QSIG

## Field Descriptions

Parameter | Description | Default Value
Controller Module | System-generated, protected field. Identifies the module position (1-4) in the controller. |
Port | System-generated, protected field. Identifies the port (1 or 2) in the module. |
Link Number | System-generated, protected field. Identifies the link number. |
Protocol | System-generated, protected field. Shows the protocol (DMS-100, QSIG, ISDN-BRI, etc.) from ISDN Protocol form. |
Protocol Variant | System-generated, protected field. Shows the protocol variant from the ISDN Protocol form. |
Type | Select Fixed (for all calls) or Call-by-Call. | Fixed
Fixed High Layer Compatibility | Select the High Layer characteristics identification that applies. Unassigned Telephony Fax Grp 2/3 Grp 4 class 2/3 Grp 4 class 1 Telex F.220 Telex F.200 Videotex Telex F.60. | Telephony
Call by Call High Layer Compatibility | Telephony

Call by Call High Layer Compatibility - Select the High Layer characteristics identification that applies.