This object specifies whether CAS bits are carried by the service. This also selects which AAL1 format should be used. The possible values are : basic(1) : for 1x64 connections, cells will be generated with a AAL1 pointer. While receiving, pointer will be expected in the incoming cells. ds1SfCas (3), ds1EsfCas (4): used when line level multiframe sync to be enabled. ccs(5) : Common Channel Signaling. This particular VC is carrying signaling information. This value is not supported in CESM-8T1E1. basicNoPointer(7): 1x64 basic connections without AAL1 pointer. This is to support CES-IS 2.0 compliance. In CESM-8T1/E1 all channels on a line should have the same value. The value basic(1) is applicable for cesCBRService value of unstructured(1). The CESM-4P and CESM-T3E3 cards support value basic(1) only.