N2::ISUP::Codec

Introduction

The following ASN.1 codec methods are available from the N2::ISUP module.

The method N2::ISUP::Codec::decode will automatically detect the message type, and will return one of the following structures, and including the message_type attribute in order to indicate the decoded message type.

• Answer (ANM)
• Address Complete Message (ACM)
• Call Progress (CPG)
• Connect (CON)
• Initial Address Message (IAM)
• Release (REL)
• Release Complete (RLC)

The following message encode methods are available.

• N2::ISUP::Answer::encode Answer (ANM)
• N2::ISUP::AddressCompleteMessage::encode Address Complete Message (ACM)
• N2::ISUP::CallProgress::encode will encode Call Progress (CPG)
• N2::ISUP::Connect::encode will encode Connect (CON)
• N2::ISUP::InitialAddressMessage::encode Initial Address Message (IAM)
• N2::ISUP::Release::encode Release (REL)
• N2::ISUP::ReleaseComplete::encode Release Complete (RLC)

All methods will return undef on success, and a non-empty error description string on failure.