2718 CHAPTER 179: VOFR CONFIGURATION COMMANDS

sub-channel status. If the keepalive keyword is configured, network congestion is considered occurring when one end fails to receive any KeepAlive message within a period of time. In this case, the active call control sub-channel will be deactivated, and no voice call can be set up any longer. If the keepalive keyword is not configured, the control sub-channel status is synchronized with the PVC status.

huawei-compatible: Adopts the Huawei-compatible mode.

motorola-compatible: Adopts the Motorola-compatible mode for compatibility with VoFR of Motorola routers.

nonstandard-compatible: Adopts the nonstandard-compatible mode for compatibility with VoFR of Cisco routers.

dce: Specifies the virtual circuit to serve as a DCE in compliance with Annex G.

dte: Specifies the virtual circuit to serve as a DTE in compliance with Annex G.

Description Use the vofr command to configure a VoFR operation mode for a DLCI.

Use the undo vofr command to restore the default.

By default, no VoFR operation mode is configured.

If the VoFR operation mode is set to Motorola-compatible and the call mode is set to static (FRF.11 trunk mode), a call failure will occur.

In the Motorola-compatible mode, one DLCI can work in either the dynamic mode or the FRF.11 trunk mode. In the Huawei-compatible or Motorola-compatible mode, the T1.167 Annex G protocol is adopted. In this case, different ANNEX G-compliant control block types must be configured at both ends: one to DTE and the other to DCE.

Related command: call-mode.

Example # Set the call control protocol on DLCI 1000 to nonstandard-compatible, call control sub-channel number (ccid) to 4, and data sub-channel (dcid) to 5, and enable the regular sending of KeepAlive messages.

<Sysname> system-view [Sysname] interface serial 1/0

[Sysname-Serial1/0] link-protocol fr ietf

[Sysname-Serial1/0] fr dlci 110 [Sysname-fr-dlci-Serial1/0-100] vofr nonstandard-compatible signal-c hannel 4 data-channel 5 keepalive

# Set the call control protocol on DLCI 200 to Huawei-compatible (DTE).

<Sysname> system-view [Sysname] interface serial 1/0

[Sysname-Serial1/0] link-protocol fr ietf

[Sysname-Serial1/0] fr dlci 200 [Sysname-fr-dlci-Serial1/0-100] vofr huawei-compatible dte

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3Com MSR 30, MSR 50 manual Related command call-mode