The OECB allows you to enter alphanumeric entries in the User database and in the routing table because it can modify the request URI to use either alphanumeric or numeric entries, depending on the setting you choose for egress-uri-mode. When the OECB locates the home agent to which the call is routed, it uses one of the following configurable values from the egress-uri-mode parameter in the Agent configuration to determine whether or not to convert the request URI:

• No-conversion (Default)-The OECB adds only the IP address of the Home Agent in the outbound call.
• Convert-to-aor- When the incoming URI is a number, the OECB replaces it with the configured address of record in the outbound call.
• Convert-to-number-When the incoming URI is an Address of Record, the OECB replaces it with the configured number in the outbound call.

See "Alphanumeric User DB and Call Routing Entries" and "Configure a Session Agent" in the User Guide.