QOS, delivery order decoded as Traffic Class?

Hi,

I've question about QOS decoded message. why for Delivery order below become "Streaming Class" ? not Without delivery order ('no'), the number I trace subscribed with Streaming Class.

GSM A-I/F DTAP - Activate PDP Context Accept
    Protocol Discriminator: GPRS session management messages
        1... .... = TI flag: allocated by receiver
        .000 .... = TIO: 0
        .... 1010 = Protocol discriminator: GPRS session management messages (10)
    01.. .... = Sequence number: 1
    DTAP GPRS Session Management Message Type: Activate PDP Context Accept (0x42)
    0000 .... = Spare bit(s): 0
    .... 0011 = LLC SAPI: SAPI 3 (3)
    Quality Of Service - Negotiated QoS
        Length: 14
        00.. .... = Spare bit(s): 0
        ..00 1... = Quality of Service Delay class: Delay class 1 (1)
        .... .011 = Reliability class: Delay class 3 (3)
        1001 .... = Peak throughput: Up to 256 000 octet/s (9)
        .... 0... = Spare bit(s): 0
        .... .001 = Precedence class: High priority (1)
        000. .... = Spare bit(s): 0
        ...1 1111 = Mean throughput: Best effort (31)
        011. .... = Traffic class: Interactive class (3)
        **...1 0... = Delivery order: Streaming class (2)**
        .... ..11 = Delivery of erroneous SDUs: Erroneous SDUs are not delivered('No') (3)
        Maximum SDU size: 1500 octets (150)
        Maximum bitrate for uplink: 8640 kbps (254)
        Maximum bitrate for downlink: 8640 kbps (254)
        0111 .... = Residual Bit Error Rate (BER): 1*10-5 (7)
        .... 0100 = SDU error ratio: 1*10-4 (4)
        1000 00.. = Transfer delay: 1000 ms (32)
        .... ..01 = Traffic handling priority: Priority level 1 (1)
        Guaranteed bitrate for uplink: 0 kbps (255)
        Guaranteed bitrate for downlink: 0 kbps (255)
        000. .... = Spare bit(s): 0
        ...0 .... = Signalling indication: Not optimised for signalling traffic
        .... 0000 = Source statistics description: unknown (0)
        Maximum bitrate for downlink (extended): 21 Mbps (79)
        Guaranteed bitrate for downlink (extended): Use the value indicated by the Guaranteed bit rate for downlink (0)

Thanks